Wozniacki, a 19-year-old Dane ranked sixth in the world, retired from the first-round match at the Luxembourg Open with a hamstring injury on Wednesday while leading Anne Kremer of Luxembourg 7-5, 5-0.
Wozniacki's father, Piotr, told his daughter at 3-0 in the second set to retire before winning because her injury would prevent her from playing in the next round. His comments, apparently spoken in his native Polish, were picked up by microphones and heard by viewers watching the match on the Internet.
Story continues below ↓advertisement | your ad here"I went onto the court and said to her: 'Caro, it does not matter whether it's going to be 5-0, 4-1 or 3-2. You can not play the next round, so you shouldn't take the risk,"' Piotr Wozniacki said Thursday on Danish radio. "I'm very proud of Caroline, because she stopped the fight and gave her opponent a chance."
The father's comments during the match led to a surge in online bets for Kremer to win.
The governing bodies of tennis created a Tennis Integrity Unit last year to combat gambling and match-fixing.
"We're just looking into everything that happened in this match," WTA spokesman Neil Robinson said, adding that he believed the information would go to the integrity unit. "I would think that would be the way it would go. They are aware of it."
The Tennis Integrity Unit does not comment on cases, and neither would Betfair, an online gambling site that works closely with tennis authorities.
"Under the terms of our memorandum of understanding with sporting bodies worldwide, it is up to the sporting authorities to comment," Betfair spokesman Tony Calvin said. "However, it is reasonable to assume that in high-profile cases like this, correspondence has been made."
Betfair, however, said it did not have any concerns about the match at this stage, and that the money won or lost was not unusual.
In Danish newspaper Ekstra Bladet, Wozniacki professed her innocence.
"So, people bet on my matches. Some win, others lose. I just know that I am clean. It is most important to me," Wozniacki said. "And if anyone is in doubt about my injury, I can both produce scan from the hospital and a report from the tournament physiotherapist."
Although it appears unlikely that Wozniacki conspired to fix the match, she could still be fined for "lack of effort" according to International Tennis Federation statutes.
In 2007, Betfair voided all bets on a match involving Nikolay Davydenko because of suspicious gambling patterns. The Russian withdrew against Martin Vassallo Arguello in the third set of a match in Poland, citing a foot injury. Both players were cleared of any wrongdoing after an ATP investigation.
Since the Davydenko match, other players have said they have been approached by outsiders trying to influence a match, and still more have been fined or suspended for gambling on matches.
Also, Davydenko was fined $2,000 for lack of effort after a loss that same year at the St. Petersburg Open, but the charge was dropped after the Russian won an appeal.
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