Just a couple questions to those who think it was a ''perfect shot''

This.

 

Solis's legs are cleary gone when he tries to get up. His right leg was injured, yet he clearly has a huge problem balancing on his left when he gets up. He was hurt by a punch. Whether it happened before or after popping his knee is pretty much irrelevant. His punch resistance let him down, as well as his overweight unconditioned body putting strain on his knee.

Even if Solis was winning the round, it didn't matter, he lost. Much the same as when Vitali lost to Lewis despite being ahead on the cards - it just doesn't matter.