John Higgins has tested positive for Covid-19 and been forced to withdraw from the German Masters in Milton Keynes.
The four-time world champion had been due to start his campaign on Wednesday against Stuart Carrington, who now receives a bye.
All the other players in the 32-man tournament have returned negative tests.
The event marks the return of Judd Trump, who was forced to miss the Masters earlier this month after testing positive for the virus.
The world number one, who was asymptomatic throughout, plays Mark Davis on Wednesday.
Meanwhile World Snooker Tour have confirmed that next month's Welsh Open will be staged at the Celtic Manor resort for the first time.