Floyd Mayweather is the best pound-for-pound fighter in the world. 43 have tried to beat him and 43 have failed (Mayweather fought Jose Luis Castillo twice in 2002). He has been "money" for his whole career.
Anyone who has seen a Floyd Mayweather fight knows what he brings to the table. He combines blazing speed with incredible boxing acumen. The way that he has been able to pick opponents apart is legendary. Rarely, has he ever been in trouble. Anytime that he has had to fight back, he has passed those tests with ease.
Now he faces the most dangerous opponent of his entire career, Canelo Alvarez. A physical opponent, Alvarez is looking to derail Mayweather. He has the size and power to threaten Mayweather if he can implement the advantages I mentioned.
This is easier said than done against someone like Mayweather. He has more dimensions as a fighter than Alvarez has. He simply can do things in the ring that Alvarez can not do.
He must use these advantages wisely if he wants to control the ring and give Alvarez a boxing lesson. It could very well be a brutal day at school for young Alvarez.