London - David Nalbandian has been fined the maximum £8 013 and faces a police investigation into an assault complaint after kicking an advertising board and injuring a line judge during the Queen's Club final.
VIDEO: David Nalbandian kicks out
The ATP confirmed the fine for unsportsmanlike conduct on Monday. Nalbandian also was stripped of his £36 500 in prize money.
London police declined to say who made the assault complaint against Nalbandian, who was defaulted from Sunday's match against Marin Cilic in the grasscourt Wimbledon warmup event.
Any member of the public who witnessed the event in person or on television could have made a complaint, as could the line judge himself.