Top-ranked Novak Djokovic wins his third Sony Ericsson Open title Sunday in Key Biscayne, Fla., holding every service game to beat Andy Murray 6-1, 7-6.

Andy Murray reacts after losing a point to Novak Djokovic during the men's singles final at the Sony Ericsson Open on Sunday. Because of two walkover victories, Murray was playing for the first time since Wednesday, which might explain his slow start.

Novak Djokovic improved to 20-2 this year and 90-8 since the start of 2011. He didn't lose a set in six rounds at Key Biscayne.

Andy Murray returns a shot to Novak Djokovic during the men's singles final Sunday.

Novak Djokovic serves to Andy Murray in the men's singles final match at Key Biscayne, Fla.

Andy Murray returns a shot against Novak Djokovic.

Agnieszka Radwanska of Poland blows a kiss to the crowd as she holds her crystal championship trophy Saturday following her 7-5, 6-4 win over Maria Sharapova of Russia in the women's singles final at the Sony Ericsson Open in Key Biscayne, Fla.

The bubble machine was fired up at the Sony Ericsson Open in Key Biscayne, Fla., on Saturday — but Maria Sharapova (left) was not in a bubbly mood after her loss to Agnieszka Radwanska in the women's final.

Agnieszka Radwanska claims the Sony Ericsson Open title with a 7-5, 6-4 victory over Maria Sharapova in Key Biscayne, Fla., on Saturday. Radwanska improved to 2-7 against Sharapova, the other victory coming at the 2007 US Open.

Agnieszka Radwanska, ranked a career-best No. 4, earns her ninth career title and fourth since last summer with a two-set win against Maria Sharapova. Radwanska is 0-4 in 2012 against top-ranked Victoria Azarenka and 26-0 against everyone else.

Maria Sharapova finishes with 45 unforced errors, many from the backhand side. Agnieszka Radwanska commits only 10 unforced errors and erases all three break points.

With the loss, Maria Sharapova falls to 0-4 in the Key Biscayne finals. She was also runner-up in 2005, '06 and last year.

Agnieszka Radwanska, winning her ninth WTA title Saturday, improves to 26-4 on the season, tied for most match wins on the tour this year with Victoria Azarenka (26-1).

Sharapova was on ice even before Radwanska made it official.

Novak Djokovic will face Andy Murray in Sunday's final. Murray was the beneficiary of two walkover victories, so he could come out both rested and rusty. It's definitely a match you will want to tune into.

Jelena Ristic, girlfriend of Novak Djokovic, has watched her significant other rack up a number of trophies in recent years and has a chance to do so again this Sunday.

Great weather, great atmosphere, elite tennis. Not a bad plan if you happen to be on spring break.

Had Juan Monaco started the match the way he played the second set, maybe he could have made the final outcome more interesting.

Novak Djokovic of Serbia in action during the semi-final against Juan Monaco of Argentina at Crandon Park Tennis Center in Key Biscayne, Florida. Djokovic won the first set 6-0, but the second was more of a struggle.

. . . both on Crandon Park Tennis Center at Key Biscayne, Fla., and on David Ferrer on Thursday as No. 1 Novak Djokovic had little trouble with the Spaniard, winning 6-2, 7-6 (1) in the quarterfinals.

Which wasn't long, as world No. 1 Novak Djokovic (in black) made quick work of David Ferrer on Thursday. The match was not without some drama; however, as the two men had a 40-stroke rally, which Ferrer won.

David Ferrer was game against Novak Djokovic on Thursday, but was unable to join countryman Rafael Nadal in the semis.

Agnieszka Radwanska of Poland defeated France's Marion Bartoli 6-4, 6-2 on Thursday, setting up a finals match against Maria Sharapova on Saturday.

Mardy Fish quickly went from the final American playing in Key Biscayne to the last one out on Thursday, falling to Juan Monaco 6-1, 6-3 in the quarterfinals.

Juan Monaco of Argentina rang in No. 28 in style, dropping Mardy Fish in straight sets on Thursday.

Maria Sharapova is into Saturday final at Key Biscayne after a dramatic 4-6, 6-2, 6-4 semifinal win over Caroline Wozniacki on Thursday. The most drama came when what would have been a double-fault on Sharapova was overturned, setting up the match-winning point.

Caroline Wozniacki won the first set against Maria Sharapova on Thursday, but their back-and-forth match went down to the wire, and ultimately went to Sharapova. After a controversial overruling, Wozniacki refused to shake the umpire's hand after the match.

Rafael Nadal of Spain serves during his three-set victory over Jo-Wilfried Tsonga of France during the quarterfinals Wednesday night at the Sony Ericsson Open in Key Biscayne, Fla.
 

Jo-Wilfried Tsonga lets loose with one of his potent forehands during Wednesday night's quarterfinal match. Tsonga pushed Rafael Nadal deep into the third set before falling 6-2, 5-7, 6-4.

Venus Williams may have lost Wednesday to Agnieszka Radwanska, but she's still a fan favorite. Her run to the Sony Ericsson Open quarterfinals thrilled crowds at Crandon Park Tennis Center in Key Biscayne, Fla., over the past week and a half.

No one in women's tennis has the wingspan and athleticism to cover the net like Venus Williams, and she shows that here during her quarterfinal match Wednesday against Agnieszka Radwanska.

Top-ranked Victoria Azarenka had her 26-match unbeaten run to start the 2012 season ended Wednesday by Marion Bartoli. "I'm a human, not a superwoman, and I wish I could be, but I'm not," Vika said after the match.

Marion Bartoli was aggressive at the baseline while handing Victoria Azarenka her first defeat of the year during Wednesday's quarterfinals. "Sometimes I took the ball extremely early," she said. "It was almost table tennis."

Fans find numerous ways to protect themselves from the sun as they watch Wednesday's quarterfinal match between Janko Tipsarevic of Serbia and Andy Murray of Great Britain.

Andy Murray, who suffered from an upset stomach and excessive burping during Wednesday's tough, three-set victory over Janko Tipsarevic, celebrates winning match point with a big-bellied roar.

Janko Tipsarevic shows excellent balance while getting to a shot during his match Wednesday against Andy Murray.

Andy Murray and Janko Tipsarevic exchange greetings at the net after their tense, top-10 battle on Wednesday.

Caroline Wozniacki smacks a backhand return during her 6-4, 6-4 quarterfinal victory Tuesday over Serena Williams in the Sony Ericsson Open in Key Biscayne, Fla.

Spanish star Rafael Nadal celebrates his straight-set victory over Japan's Kei Nishikori in the fourth round on Tuesday.

Kei Nishikori puts a little extra oomph on this serve during his fourth-round match Tuesday against Rafael Nadal.

Juan Monaco of Argentina acknowledges fans after his 7-5, 6-0 win over Andy Roddick in fourth-round play Tuesday.

Novak Djokovic brings the clay-court slide onto the harder surface to return a shot during a hard-fought victory Tuesday over Richard Gasquet of France.

Grigor Dimitrov of Bulgaria returns a shot on Tuesday in his match against Janko Tipsarevic. Dimitrov pushed Tipsarevic early but fell 7-6 (3), 6-2 in the fourth round.

Victoria Azarenka of Belarus pulled of a magic act to advance to the quarterfinals after losing the first set 1-6 and falling behind 1-5 in the second. Next up is No. 7 seed Marion Bartoli of France in the quarterfinals.

Venus Williams lost a first-set tiebreak against Ana Ivanovic, but Venus was able to rally and take the final two sets to defeat the No. 15 seed.

Andy Roddick reacts to beating Roger Federer, and considering he had gotten the better of the Swiss stud only twice in 23 previous meetings, the expression of satisfaction is understandable.

Roger Federer, of Switzerland, acknowledges the fans after he was unable to keep his momentum from a strong second set and fell 7-6, 1-6, 6-4 to Andy Roddick during the Sony Ericsson Open. Federer praised Roddick's play after the match.

Serena Williams leaps into the air after defeating Samantha Stosur of Australia. Williams was able to turn things around twice as her serve was broken in the first game of each set.

Serena Williams serves to Roberta Vinci during her 6-2, 6-1 victory in the third round Saturday at the Sony Ericsson Open in Key Biscayne, Fla.

Cedric-Marcel Stebe of Germany rips a forehand against Richard Gasquet of France during their second-round match on Saturday. Gasquet got past Stebe in three sets.

Andy Roddick signs autographs after his second-round victory over Gilles Muller of Luxembourg on Saturday.

Richard Gasquet powers through a backhand during his victory Saturday over Cedric-Marcel Stebe.

Bjorn Phau of Germany coils into his serve during a second-round match against Fernando Verdasco on Saturday. Verdasco, the 20th seed, easily dispatched Phau 6-3, 6-0.

Fernando Verdasco smacks a backhand during his victory over Bjorn Phau.

Ksenia Pervak of Kazakhstan sets up for a shot against Francesca Schiavone of Italy during Friday's play at the Sony Ericsson Open in Key Biscayne, Fla. Pervak upset the 11th-seeded Schiavone 6-4, 4-6, 7-5 in the second round.

Francesca Schiavone moves into her service motion during a second-round loss to Ksenia Pervak on Friday at Key Biscayne.

Kei Nishikori of Japan plays a forehand against Lukas Lacko of Slovakia during their second-round match Friday. Nishikori, the No. 16 seed, beat Lacko 6-3, 6-3.

Big-serving John Isner, the No. 10 seed, lets fly during his second-round victory over Nikolay Davydenko of Russia on Friday.

Lucie Safarova of the Czech Republic leans into a backhand against Great Britain's Heather Watson, but she couldn't find enough oomph often enough during the 6-2, 6-1 loss in Friday's second round.

Top-ranked Victoria 'Vika' Azarenka serves during her 6-3, 7-5 victory over Michaella Krajicek in the second round on Friday.

Nikolay Davydenko takes 10th-seeded John Isner the distance on Friday before losing 2-6, 6-3, 6-4.

Milos Raonic of Canada strikes a backhand during his second-round match against Arnaud Clement of France on Friday. The powerful Raonic got past Clement, 7-6 (7), 6-2.

Frederico Gil of Portugal slugs a backhand during his second-round match with Philipp Kohlschreiber of Germany. Gil was outslugged in the end, losing 6-2, 7-5.

Serena Williams of the USA takes a moment to reflect during her match against Zhang Shuai of China during Thursday's Day 4 of the Sony Ericsson Open. Williams won comfortably 6-2, 6-3.

Marina Erakovic of New Zealand returns a shot to Yanina Wickmayer of Belgium. Wickmayer won 6-3, 6-4.

Serena Williams knows how to win and do so in style. Maybe her dress, which matched the court, was too much camouflage for China's Zhang Shuai to overcome.

Yanina Wickmayer was able to take advantage of Marina Erakovic's poor first-serve percentages and hit some clean winners during her 6-3, 6-4 triumph.

American Ryan Harrison got into a bit of early trouble by dropping the first set against Potito Starace of Italy, but the promising youngster from Louisiana ultimately prevailed 6-7 (6), 6-4, 6-4.

Ryan Harrison of the USA sits at No. 65 in the rankings. He has quite a climb to get to the top 10, but beating Potito Starace of Italy in the first round of the Sony Ericsson Open will help his cause a bit.

Potito Starace of Italy has seen his ranking bounce between the mid-40s for his career. He was upset by upstart American Ryan Harrison in three sets in the opening round of the Sony Ericsson Open.

Kaia Kanepi of Estonia holds a cavy from the Miami Zoo during Day 4 of the Sony Ericsson Open. What's a cavy, you ask? It is a rodent that is native to South America.

Julia Goerges of Germany tried to make it interesting against Belgium's Kim Clijsters in the second set, but she came up just short of extending the match and fell 6-2, 7-5.

Jelena Jankovic played like anything but a former No. 1 as she was crushed by Germany's Mona Barthel.

Mona Barthel of Germany barely had enough time to break a sweat as she steamrolled former world No. 1 Jelena Jankovic 6-0, 6-3.

Maria Sharapova sits with a bag of ice on her head during a break in her match against Shahar Peer of Israel. Sharapova needed a while to get going, but she rallied to win after dropping the first set.

Shahar Peer of Israel hits a return to Maria Sharapova of Russia. Peer had reason to be optimistic after winning the first set 6-4, but Sharapova won the last two 6-3 and 6-3.

Kim Clijsters puts a lot of energy into this return shot that is headed back to Julia Goerges at the Sony Ericsson Open. Clijsters won in straight sets 6-2, 7-5.

Svetlana Kuznetsova of Russia lets loose with a serve against Iveta Benesova of the Czech Republic on Thursday. Benesova rallied to outlast the 26th-seeded Kuznetsova 1-6, 7-6(7), 7-6(7).