John Higgins, the reigning 888.com world champion, has lost his passport during a night out before the Euro-Asia Challenge in Hong Kong.
Higgins was on a promotional tour of the city on a tram with fellow European players Ronnie O'Sullivan, Stephen Hendry and Ken Doherty and Asians Marco Fu, Ding Junhui. James Wattana and Supoj Saenla.
"I think I lost it somewhere between the hotel and the tram," said Higgins. "All I know is that I'll have to sort something out quick.
"If no one finds it, I'll have to go to the British consulate to have a new one issued."
The tournament, which carries a £25,000 top prize, ends on Sunday.