AFP reports that Alexandr Dolgopolov confirmed that he was among the players to receive a letter from the Tennis Integrity Unit, the sports anti-corruption arm that deals with suspicious betting. Dolgopolov didn’t reveal what the letter said, but did mention he wasn't the only player to have been contacted. "I wasn't really surprised because I knew some guys, you know, like Russian guys, they got those letters," he said.
A source told AFP that tennis officials were investigating about 10 suspicious cases from recent months, most of those matches being in the early rounds of small tournaments.
Serbia's Janko Tipsarevic also confirmed that he was contacted over his three-set defeat to Horacio Zeballos in Moscow in October.
"I said to the TIU that I have no problem, they can send me a letter every week if they want," Tipsarevic told ubitennis.com. “All it needed was a phone call to my bank, to my phone company and I gave them everything. Easy, just took seven days, I sent them my account, the telephone list, everything they wanted, what’s the problem?"—Matthew Cronin