Argentinian David Nalbandian was on his best behaviour but slipped out of Wimbledon on Monday, losing to eighth seed Janko Tipsarevic.
Nalbandian was disqualified from the AEGON Championships final eight days ago after kicking an advertising hoarding against a line judge's leg, costing him his prize money and a fine from the ATP, who run the men's tour.
The 30-year-old kept his cool this time but he groaned out of frustration on several occasions as he fell to a 6-4 7-6 (7/4) 6-2 defeat against Tipsarevic.
Nalbandian, runner-up to Lleyton Hewitt at Wimbledon in 2002, spurned five early break points and Tipsarevic took full advantage, breaking in the seventh game before winning the set.
Both players broke each other's serve in the second set which was settled on a tie-break, which Tipsarevic won after two mini-breaks.
Serbian Tipsarevic wasted five break points in the third set but took a sixth when crashing a backhand in to the corner after a weak serve.
Serving to stay in the match, Nalbandian buckled, placing an easy forehand wide to seal his demise.
Nalbandian graciously accepted defeat, embracing his opponent before shaking hands with the umpire.
Meanwhile, police investigating events at Queen's Club following a complaint of alleged assault confirmed on Monday that a 30-year-old man, understood to be Nalbandian, was interviewed over the injury he caused to line judge Andrew McDougall.
A Scotland Yard spokesman said: "We were made aware of an incident at the AEGON Championships on Sunday June 17.
"A complaint was made and the MPS [Metropolitan Police Service] are now investigating.
"On Tuesday June 19 a 30-year-old man attended a West London police station by appointment in connection with an allegation of assault.
"He was interviewed under caution.
"Enquiries continue and there have been no arrests."
Of the police investigation, Nalbandian said: "I don't know what they're going to do. I just gave my statement, and that's it.''