Jon Jones walks away after putting Lyoto Machida to sleep with a guillotine choke in the second round of the main event to defend his light heavyweight title Saturday at UFC 140 in Toronto. Jones got the submission at 4:26 of Round 2.

Champion Jon Jones gets ready for the start of his light heavyweight title bout against challenger Lyoto Machida at UFC 140. Jones successfully defended his title for the second time.

Jon Jones and Lyoto Machida try to gain an upperhand in their UFC 140 light heavyweight title bout. Machida gave the champion plenty of trouble in the first round.

Lyoto Machida knocks Jon Jones backward with a solid left in the first round of their UFC 140 title bout. It was one of the first time anyone has landed a shot like that against the champion, but after the fight Jones said he was able to prove to his doubters that he could take a punch.

Jon Jones puts up his hands to defend himself against an attack from Lyoto Machida at UFC 140. Machida used his blitz-type attacks against the champion with varying degrees of success before Jones took control of the bout in the second round.

Lyoto Machida lies unconscious in the Octagon after being submitted by light heavyweight champion Jon Jones in their UFC 140 title bout. Machida fell limp to the mat after the referee stopped the fight.

Jon Jones after walks in the Octagon after defeating fighter Lyoto Machida at UFC 140. Jones improved to 15-1 with the win.

Jon Jones wears the UFC light heavyweight championship belt after defeating Lyoto Machida. Machida, a former light heavyweight champion, fell to 17-3 in his career with the loss.

Frank Mir secures his victory over Antônio Rodrigo Nogueira at UFC 140 after applying a kimura on his opponent, eventually snapping his shoulder loose.

Antônio Rodrigo Nogueira looks at his shoulder after it popped out when he was submitted by Frank Mir in the first round of their UFC 140 heavyweight bout. It wasn't easy to watch, but viewers could see the moment the shoulder got loose.

A view of Frank Mir's submission attempt against Antônio Rodrigo Nogueira in the first round of their heavyweight bout at UFC 140 in Toronto.

Antônio Rodrigo Nogueira is unable to escape the kimura Frank Mir placed on him in the first round of their UFC 140 heavyweight fight.

Frank Mir walks around the ring as Antônio Rodrigo Nogueira gets worked on after Mir's submission victory at UFC 140.
 

Well, not quite. But Frank Mir did put himself among the heavyweight title contenders with his win over Antônio Rodrigo Nogueira at UFC 140. It was an impressive, come-from-behind win against the Brazilian legend.

Antônio Rogério Nogueira lands the knee that sends Tito Ortiz to the canvas for the remainder of their light heavyweight fight at UFC 140. Ortiz said it was just like the knee that Rashad Evans landed against him in their fight at UFC 133.
 

Once he got Tito Ortiz to the ground, Antônio Rogério Nogueira went to work on Ortiz's ribs. A constant barrage of fists and elbows by the Brazilian spelled the end for the American.
 

Antônio Rogério Nogueira and Tito Ortiz look to land blows in their light heavyweight bout at UFC 140 in Toronto. Nogueira came away with the win against "The People's Champion" with a first-round TKO.
 

Antônio Rogério Nogueira has his hand raised after his win over Tito Ortiz.
 

Antônio Rogério Nogueira smiles after getting his TKO win over Tito Ortiz. Nogueira improved to 20-5 with the win.
 

Claude Patrick backpedals as Brian Ebersole goes on the attack in their welterweight bout at UFC 140 in Toronto. Ebersole defeated Patrick via split decision (29-28, 28-29, 29-28).

 

Brian Ebersole tries to escape a choke from Claude Patrick at UFC 140. Ebersole would escape and go on to grab the win, the 49th of his career.
 

A victorious Chan Sung Jung walks back to his dressing room at UFC 140 in Toronto. Jung improved to 12-3 with the win.

Chan Sung Jung celebrates his seven-second first-round KO win over Mark Hominick at UFC 140. It tied a record for the fastest KO in UFC history.
 

Chan Sung Jung, aka "The Korean Zombie," pounces on Mark Hominick after flooring the Canadian just seconds into the first round of their featherweight bout at UFC 140 in Toronto. The fight was stopped by referee Herb Dean after seven seconds when Hominick coulnd't defend himself as Jung rained blows down on him.

Krzysztof Soszynski is examined in the Octagon after his first-round KO defeat against Igor Pokrajac at UFC 140. Soszynski fell to 26-12-1.

Igor Pokrajac celebrates his first-round KO victory against Krzysztof Soszynski at UFC 140. Pokrajac improved to 24–8 with the win.

Krzysztof Soszynski and Igor Pokrajac trade punches during their light heavyweight bout at UFC 140 in Toronto. The fight didn't last long, as Pokrajac defeated Soszynski via KO (punches) at 0:35 of Round 1.
 

Constantinos Philippou celebrates his win KO over Jared Hamman at UFC 140. Philippou improved to 9-2 with the victory.

Dennis Hallman applies a rear naked choke on John Makdessi in their bout at UFC 140 in Toronto. Makdessi was unable to escape and tapped out at 2:58 of the first round.
 

Constantinos Philippou takes hold of Jared Hamman in their middleweight bout at UFC 140 in Toronto. Philippou defeated Hamman via KO (punches) at 3:11 of Round 1.

 

Dennis Hallman celebrates his win over John Makdessi at UFC 140. The bout was contested at a catchweight of 158 1/2 pounds.

Walel Watson lands a left to Yves Jabouin in their bout at UFC 140 in Toronto. Jabouin defeated Watson via split decision (28–29, 29–28, 30–27).
 

Yves Jabouin celebrates his win over Walel Watson in their welterweight bout at UFC 140. Jabouin improved to 17-7 with the win.
 

Mark Boeck tries to avoid a submission attempt by Nik Lentz in their lightweight bout at UFC 140. Lentz fell to 21-4-2 (one NC) with the loss.

Mark Bocek tries to fight in close against Nik Lentz in their bout at UFC 140. Boeck won the bout to improve to 10-4.
 

Mark Bocek raises his hands after the final round of his bout with Nik Lentz at UFC 140. And he was right to do so, since he won the fight.
 

Jake Hecht throws a right against Rich Attonito in their welterweight bout at UFC 140 in Toronto. Hecht defeated Attonito via TKO (punches) at 1:10 of Round 2.
 

John Cholish lands a punch against Mitch Clarke in their lightweight bout that opened UFC 140. Cholish defeated Clarke via TKO (punches) at 4:36 of Round 2.
 

Jake Hecht celebrates his TKO win over Rich Attonito at UFC 140 in Toronto on Saturday. This was Hecht's first UFC fight and he improved to 11-2 in his MMA career.