Floyd Mayweather made it 47 straight victories as a professional with a unanimous points victory over Marcos Maidana in Las Vegas.
The WBA and WBC welterweight champion - appearing in only the second rematch of his professional career - won 116-111 on two scorecards and 115-112 on the other to remove any doubt after his majority verdict from their first meeting in May.
'He bit me'
It wasn't the most straightforward of victories in Mayweather's stunning career however, and the bout got particularly interesting in the closing stages after the 37-year-old accused his Argentine opponent of biting him on the wrist.
The pair were involved in a clinch in the middle of the ring when Maidana, who again looked to rough-up his opponent throughout, was accused of the indiscretion.
"We were tangled and I didn't realise what it was.Then I saw that he bit me. After the eighth round my fingers were numb, I couldn't use my left hand," claimed Mayweather immediately after the fight.
The American took his own form of retribution in the closing stages, catching his opponent with a low blow and then appearing to taunt Maidana as he recovered in the neutral corner.
Two fights left
Both incidents served as sub-plots in another intriguing Mayweather contest, and the five-weight world champion claims to only have two more fights left in his career before retiring in 2015.
However, the lure of going one better than Rocky Marciano and reaching the magical 50-0 record may well entice the man from Michigan to box on. As always though, the money would have to be right for one of the highest-earning sportsmen in history.
Pacquiao or a Brit?
Having beaten all-comers thus far in his career, the clamour remains for Mayweather to face Manny Pacquiao in a fight for the ages, whilst British contenders Amir Kahn and Kell Brook would both love the opportunity to add the solitary blemish on a glittering career.