Saul 'Canelo' Alvarez claimed a unanimous decision over Edgar Berlanga to retain his status as WBA, WBC and WBO super-middleweight world champion.
Fighting in front of more than 20,000 fans at T-Mobile Arena in Las Vegas, the four-weight world champion knocked down Berlanga in the third round and was later awarded the victory by scores of 118-109, 118-109 and 117-110.
The 34-year-old improved his record to 62-2-2 with his triumph over the previously unbeaten Berlanga (22-1) and marked Mexican Independence Day celebrations with his fifth straight victory.
Alvarez said: "I did good. Before they say I fought older fighters. Now what are they going to say? I fight younger fighters? They always talk.
"I'm the best fighter in the world. It means a lot. It's an honour for me to represent my country on this day. I feel proud about it."
Alvarez was stripped of his IBF belt in July after opting to take on Berlanga rather than the IBF's mandatory challenger William Scull.
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