Manny Pacquiao vs. Brandon Rios

Brandon Rios, left, and Manny Pacquiao exchange blows during their bout Sunday in Macao.   (Nicky Loh / Getty Images)

Brandon Rios lands a left jab against Manny Pacquiao during a bout on Nov. 24, 2013, in Macau.

Brandon Rios and Manny Pacquiao battle in close quarters during their WBO welterweight fight.   (Nicky Loh / Getty Images)

Manny Pacquiao puts Brandon Rios on the defensive in their fight on Sunday.  (Nicky Loh / Getty Images)

A battered Brandon Rios tries to slug it out with Manny Pacquiao in their welterweight bout in Macao.   (Vincent Yu / Associated Press)

Brandon Rios covers himself as Manny Pacquiao delivers a right hand to the body during their welterweight bout on Sunday.   (Dale de la Rey / AFP / Getty Images)

Manny Pacquiao lands a right to the head of Brandon Rios during their WBO welterweight fight in Macao.   (Vincent Yu / Associated Press)

Manny Pacquiao, left, and Brandon Rios fight inside during their welterweight bout on Sunday.   (Dale de la Rey / AFP / Getty Images)

Manny Pacquiao works the body of Brandon Rios during their fight on Sunday in Macao.   (Dale de la Rey / AFP / Getty Images)

Manny Pacquiao and Brandon Rios embrace after their 12-round welterweight title fight on Sunday in Macao.   (Nicky Loh / Getty Images)

Manny Pacquiao celebrates after defeating Brandon Rios by unanimous decision. One judge had it 120-108, another 119-109 and the third 118-110.   (Nicky Loh / Getty Images)

Manny Pacquiao celebrates with his team after defeating Brandon Rios by unanimous decision in their WBO international welterweight title fight on Sunday in Macao.  (Vincent Yu / Associated Press)