Former Wimbledon finalist David Nalbandian was disqualified from the Queen's Club final after kicking an advertising board, which subsequently struck and injured line judge Andrew McDougall.
The ATP fined the former World No. 3 the maximum of $12,600. Nalbandian additionally forfeited $56,800 of prize money and ranking points for the week.
Up a set and down a break to Croatia's Marin Cilic, the Argentine kicked an advertising board in frustration after losing a service game. The sign, which bordered McDougall's chair, splintered and went straight into the line judge's leg and cut it.
McDougall cried out immediately and grabbed his leg. When he rolled up his khakis, blood was seeping from his shin.
Nalbandian apologized to McDougall immediately after kicking the board.
I know (what) I did (is) a mistake, 100 percent. I feel very sorry for the guy. I didn't want to do that. But sometimes you get angry and you cannot control those moments, said Nalbandian after the match.
After checking on the injured official and prolonged discussions between tournament and ATP officials, umpire Fergus Murphy disqualified Nalbandian for unsportsmanlike behavior.
The 12,000 capacity crowd booed, whistled and called for the two to play on but the match was decided.
Nalbandian, is currently ranked 39th in the world and is still set to play Wimbledon, which begins next Monday.
The Argentine was looking for his first ATP tour win since he won Legg Mason in Washington, D.C. in 2010, and his first ever grass court title.
British police are now investigating a complaint of assault against Nalbandian.
The Argentine has a reputation for being temperamental.
A decade ago, Nalbandian exploded and verbally abused a linesman after a line call went against him. He was thrown out of the Vina del Mar tournament in Chile for his actions, though the incident went largely unnoticed because he had yet to make a name for himself on the international stage.
Earlier this year at the Australian Open, Nalbandian was also fined $8,000 for unsportsmanlike conduct after he poured water on a staff member.
He is not the first tennis star to lose his cool on court, and this will be one of the most infamous moments of his career.