For the second successive summer and pre-season tour of the United States, the Chelsea players have had a brand new system to get used to. They are currently starting to understand the philosophies of Enzo Maresca, as he prepares for his first game as a Premier League manager. There looks to have been some teething problems for Chelsea during pre-season. Questions have been left for Maresca that supporters certainly need answering. READ MORE: Chelsea squad numbers 2024/25 with key shirts available to potential Enzo Maresca signingsThere are a number of positions in the side up for grabs right …