IBF, IBO, WBA, WBO heavyweight champion Andy Ruiz has seen recent videos of Anthony Joshua and he believes the British superstar is indeed slimmer than he was back in June.

Ruiz stopped Joshua in seven rounds after four knockdowns back in June at Madison Square Garden in New York City.

The rematch is scheduled for December 7th in Saudi Arabia.

Some observers felt Joshua had way too much muscle mass - which affected his stamina and ability to move around the ring.

But Ruiz wonders if Joshua can still take hard combinations when they connect on his chin.

"I saw videos where he looked slimmer. I don't know if that's an advantage or a disadvantage. I don't know if he will take the punches as well as he did when he weighed more," Ruiz told Sky Sports.

While Joshua looks slimmer - there are a lot of people who believe Ruiz has lost too much weight.

But Ruiz denies that as being fact. He explained this his weight for the rematch will only be eight pounds apart from the first contest.

"Me? People are saying I lost too much weight, I won't be strong, he will move me around. I am losing eight pounds from what I weighed on June 1. I'll still be the same, I'll still be strong. AJ has always been in shape. He has always looked really good, really cut up," Ruiz said.

The first time around, Ruiz only had a few weeks notice after Jarrell Miller was pulled from the fight for failing several drug tests. This time around, Ruiz had an full twelve week training camp to prepare himself.