Chelsea players are beginning to step up their pre-season training ahead of the upcoming tour of the United States. Enzo Maresca has been given the chance to take a look at a large amount of the players available to him in order to see who he can rely on when the season gets underway. He seems to have had a large amount of advice to give the player despite not being there long. Maresca was heard shouting instructions to Noni Madueke as he looks to mold the players into his shape. READ MORE: Chelsea player has already learned completely new things under Enzo MarescaA number of youngsters at the…