Argentine tennis player David Nalbandian caused an abrupt and ugly end to Sunday's Queen's Club tournament final in London when he lost his temper and kicked an advertising sign...and the linesman sitting directly behind it.
The linesman rolled off his chair and had blood on his shin that had to be attended to by medical staff as a result of the wooden sign smashing into it.
Nalbandian was defaulted for unsportsmanlike conduct and his opponent, Croatia's Marin Cilic, was declared the winner. Nalbandian is likely to be suspended after this shameful incident.
H/T Busted Racquet.