Photos: Amir Khan vs. Marcos Maidana

Amir Khan takes a punishing blow from Marcos Maidana in the third round of their WBA junior-welterweight title fight Saturday night.  (Isaac Brekken / Associated Press)

Amir Khan connects with an overhand right against Marcos Maidana during their WBA junior-welterweight title bout on Saturday night at Mandalay Bay in Las Vegas.  (Ethan Miller / Getty Images)

Marcos Maidana connects with a right against Amir Khan on Saturday night during their WBA junior-welterweight championship fight at Mandalay Bay.  (Ethan Miller / Getty Images)

Referee Joe Cortez yells for boxers Marcos Maidana, left, and Amir Khan to separate after getting tangled along the ropes Saturday night in their WBA junior-welterweight title fight.  (Ethan Miller / Getty Images)

Marcos Maidana delivers a left hook to the face of Amir Khan in their junior-welterweight title fight on Saturday night at Mandalay Bay.  (Ethan Miller / Getty Images)

Marcos Maidana delivers a combination to Amir Khan along the ropes during the WBA junior-welterweight championship bout on Saturday night in Las Vegas.  (Ethan Miller / Getty Images)

Reigning champion Amir Khan of England lands a left hand to Marcos Maidana of Argentina in the final round of their junior-welterweight title fight on Saturday night.  (Isaac Brekken / Associated Press)

Security guards restrain Marcos Maidana’s cornerman Sebastian Contursi and trainer Miguel Diaz after they got into a scuffle with Amir Khan and members of his corner following the end of the WBA junior-welterweight championship bout at Mandalay Bay in Las Vegas on Saturday night.  (Ethan Miller / Getty Images)

Amir Khan displays his WBA junior-welterweight belt alongside trainer Freddie Roach after earning a unanimous decision against Marcos Maidana on Saturday night in Las Vegas.  (Scott Heavey / Getty Images)