The Croatian expressed his frustration with Stefanos Tsitsipas in an interview with Sport Klub.
The oldest woman in the field made Madison Keys the sixth Top 10 seed to fall at Wimbledon.
"He gave me a lot of information that I can make my game similar to his, but in my style," Jannik Sinner said of Novak Djokovic.
The Brit says his grass season has opened his eyes to what needs improving in his game.
The four-time Slam champion will bid for a Wimbledon breakthrough on Friday.
World No. 1 Aryna Sabalenka is the lone Top 5 seed still standing in the ladies' draw.
Toni Nadal asserts only three men can raise the Wimbledon title trophy next weekend.
