by Brian Webber, Special to FOXSports.com

The Williams sisters — the most accomplished siblings in the history of the sport — will meet once again in a Grand Slam final with the ladies' title on the line. In the men's final, Roger Federer is looking to make history against Andy Roddick. The Swiss star has a chance to win a record-setting 15th Grand Slam singles title, solidifying his standing as the greatest player in the history of men's tennis.

There is not much to separate Serena and Venus Williams on the court. The sisters have split the 20 matches they've played on the WTA Tour. Serena prevailed in their last meeting in Miami, but Venus was victorious in the previous match this year in Dubai.

The Williams sisters have faced each other seven times in the final of a major tournament, with Serena owning a 5-2 head-to-head edge. Venus defeated her younger sister in straight sets in last year's singles final at the All England Club and is poised to become the first woman since Steffi Graf to win Wimbledon in three consecutive years.

The Williams sisters advanced to the singles final in strikingly different fashions. Venus was thoroughly dominant in destroying top-seeded Dinara Safina in the semifinals. She has now won 34 consecutive sets at Wimbledon, using her first serve as a significant weapon. Venus won 80 percent of the points on her first serve against Safina and will need a similar total if she is going to beat her sister in London.

Serena revealed her tenacity in her dramatic semifinal win over Elena Dementieva. In the longest Wimbledon women's semifinal in the Open era, Williams saved a match point and used her power to dictate the majority of the critical rallies.

Serena, however, won't be able to physically push her sister around in the singles final. This match should feature some incredible battles from the back of the court. While Serena may have a slightly stronger serve, Venus has been playing with more consistency during the fortnight in London. Venus' forehand has been dialed in throughout the tournament and it could be the deciding factor in this match.

When the Williams sisters played for the title last year, Serena jumped out to a 4-2 lead in the opening set. But Venus rallied to post a 7-5, 6-4 victory for her fifth Wimbledon crown, using that forehand to her advantage.

Venus has so much momentum that it's difficult to pick against her this year in the English capital. While Safina donated several points with her shaky play in their semifinal match, Williams demonstrated the full array of her talents in the lopsided victory.

2009 Wimbledon

 Results:

 Analysis:

• Cronin: Is Federer the greatest ever?
• Whitlock: Serena could've been the best
• Pierce: Roddick a threat once again
• Rosenberg: Tiger, Federer two of a kind
• Cronin: Serena chasing the greats

 Multimedia:

• Video: Federer talks about his win
• Photos: Gentlemen's final | Ladies' final
• Photos: Late rounds | Early rounds

 Partners:

• Tennis Week: Analysis, video and more
• Richard's Court: Inside the tennis world

Serena will be motivated by the fact that she has not won a Wimbledon singles title since 2003. Nevertheless, look for Venus to extend her Wimbledon winning streak to 21 straight matches and capture her eighth Grand slam title.

Result: Serena beats Venus, 7-6 (3), 6-2

The men's final between Federer and Roddick could have the feel of a coronation for Federer.

Federer won't have to overcome the partisan crowd he would have faced taking on Andy Murray for the championship. While Federer has struggled against Murray in head-to-head competition, the Swiss star has dominated Roddick, winning 18 of the 20 matches they have played. The American has never topped Federer on a grass court and has lost all three of their previous meetings in a Grand Slam final.

Roddick has credited coach Larry Stefanki for helping the two-time Wimbledon runner-up return to elite status. A year ago at this time, Roddick was watching the epic men's final between Federer and Rafael Nadal on television after losing in the second round. But Stefanki challenged Roddick to leave his comfort zone on and off the court, and Roddick's improved fitness has made him more mobile than in the past.

One element of Roddick's game that has never been better is his serve. The sixth seed fired a career-high 43 aces in his quarterfinal win over Lleyton Hewitt, and reached 140 miles per hour on the radar gun. Roddick will need his powerful serve to be working against Federer.

Still, Roddick cannot afford to play one-dimensional tennis. He must be willing to take some chances to prevent Federer from winning his sixth Wimbledon title. It's likely that Roddick's game plan will include attacking the net and trying to exploit Federer's backhand. Variety will be critical for the American to try to keep Federer off balance and achieve personal redemption against a player who has owned him over the years.

Roddick demonstrated his mental toughness by tuning out the spirited crowd during his semifinal win over Murray. Nevertheless, it's unlikely that Federer will allow the opportunity to make tennis history to elude his grasp. He's played nearly flawlessly the last two weeks in England. Federer's semifinal victory over Tommy Haas was just the latest reminder of how devastating the former world No. 1 can be when he has all his shots working. His court artistry and intelligent point construction should be too much for Roddick to overcome.

Pete Sampras was the last American men's tennis player to win a Wimbledon championship — in 2000. On Sunday, Federer should move past Sampras by capturing that record 15th Slam title. Based on the brilliant level of tennis that Federer has played over the years in London, it seems fitting Federer has a chance to carve out his own place in history at The Championships.

Emmy Award-winning broadcaster Brian Webber covers tennis for Tennis Channel and is a frequent contributor to FOXSports.com's coverage.