Canada's Denis Shapovalov was left mortified after joining tennis's hall of infamy on Sunday, offering an apology and promising that he would learn from his momentary explosion of temper that left a Davis Cup umpire needing a visit to hospital.
Britain reached the Davis Cup quarter-finals in bizarre circumstances on Sunday when Canadian Denis Shapovalov defaulted for inadvertently blasting a ball into the umpire's face.
Novak Djokovic was eliminated from the Grand Slam after inadvertently hitting a ball into a line judge's throat during his fourth round match on the Arthur Ashe Stadium court.
The list of players who have been defaulted from a tour-level match for on-field misconduct.
Former world number one Novak Djokovic showed signs of rediscovering his form with a dominant 6-0, 6-1 victory over Dusan Lajovic in the opening round of the Monte Carlo Masters.
Check out some of the up-and-comers who could cause an upset at Wimbledon this year.
The Frenchman, seeded five, had no answer to left-hander Muller's swinging serve as he bowed out 6-4, 6-4.