The British player, who was forced to retire at the age of 30 due to injuries, affirms that lack of rest and the balls are the main causes.
The Serbian continues his tour of events in the United States and highlighted the figure of the Croatian: "He helped me and guided me throughout the whole process."
The former world number one asks for patience with the Belarusian: "As humans, we all have highs and lows."
Since Andy Roddick's title in the US Open 2003, there has not been another American tennis player capable of reigning in New York despite being one of the federations with the highest budget and structure.
The Roland Garros champion has never managed to show her best tennis on the North American hard court tour while the New York tournament is the only one where she has not yet reached the second week.
