A first-round match at the US Open between Vitalia Diatchenko and Timea Bacsinszky is being investigated for suspicious betting patterns. The Tennis Integrity Unit said betting organisations had flagged up the match played on 30 August as suspicious. Bacsinszky, the 15th seed, beat the Russian 6-1, 6-1.

A TIU spokesperson told the Guardian: “There is a well-defined process for betting organisations to report match alerts to the Tennis Integrity Unit. That protocol should operate in a confidential fashion and involves the TIU using its expertise to assess every alert it receives, on its merits.

“Publicising match alerts not only departs from that process but is premature and inevitably draws unwarranted attention to the players involved in the match. Under the Tennis Anti-Corruption Programme all players are considered innocent unless proven otherwise at an independent anti-corruption hearing.

“As with all cases, the TIU will assess, make a judgment and take appropriate action on the alert information received.”