Saul 'Canelo' Alvarez appears to have bulked up considerably ahead of his light-heavyweight title fight with Dmitry Bivol this weekend.
The Mexican superstar will take on the 175lb Russian at the T-Mobile Arena in Las Vegas on May 7.
Canelo Alvarez is aiming to become a world champion at light heavyweight for the second time after beating Sergey Kovalev in 2019.
And he looks to be bigger and more bulky than ever in a recent Twitter post showing him putting the finishing touches to his training camp at Eddy Reynoso's House of Boxing gym in San Diego.
The Mexican's jaw appears to be tightly clenched as he can be seen straining against a machine to improve his neck muscles ahead of tomorrow's blockbuster bout.
DAZN Boxing's official Twitter account showed off his hulking body transformation, sharing the images to their 430,000 social media followers.
Alongside the pictures, where he has his top off, was the simple caption: "Canelo is ready."
Canelo Alvarez looks bigger and more bulky than ever ahead of his light heavyweight fight with Dmitry Bivol
But not everyone is convinced that everything is totally legit, with Mike Tyson's former trainer Teddy Atlas one of those wondering how Canelo has managed to change his shape so much in such a short period of time.
Atlas said on his podcast: “This is a guy who started as junior middleweight and he’s moved all the way up.
“Junior middle, middle, light heavyweight, back to middle and I can’t see him going back down from light heavyweight because he is no longer close to that man anymore.
“Whether it’s through the natural or unnatural things, listen I don’t known [whether] it’s from eating those burgers in that Mexican shop over there.
Boxing pound-for-pound king Canelo Alvarez has been training his neck muscles ahead of his bout against Dmitry Bivol
“Maybe the Whoppers that they serve over there that have a special sauce? I don’t know.
“Listen, people get mad at me but there’s some truth in there. We know he tested positive for that stuff that you’re not supposed to put in your veins and punch somebody.
“I don’t know, maybe it was just a great weight programme of lifting weights, maybe that’s all it is.”
However, Atlas also insists that Bivol
He added: “Whatever it is, he’s not the smaller guy anymore. So stop this ‘he’s moved up to light heavyweight and he beat a light heavyweight’.
“He’s a light heavyweight, he’s bigger than the light heavyweights now legitimately, he’s stronger.
“He’s thicker, just look at him. So he’s the bigger, stronger guy in there with a naturally bigger guy who was born to be bigger. He’s bigger.
“This is the first fight for me, for Canelo since his second fight with GGG that I actually think there’s a legitimate chance that his opponent can win – the first one.”