Peter Ebdon, Stephen Maguire, Marcus Campbell and Martin Gould were the biggest names to fall after the round-robin stage of the Six-red World Championship in Thailand.
The competition had eight groups of six, with the players only needing to finish in the top four to progress - but there were still high-profile casualties.
Ebdon won two of his five matches but missed out in a group that was won by Mark Williams and that also saw Aditya Mehta, Thanawat Thirapongpaiboon and Ken Doherty qualify from it.
Trump and snooker make winning return from coronavirus lockdown
Maguire, the fourth seed, could only win one match in his group despite being the highest-ranked player, while Wuxi Classic semi-finalist Campbell endured a similar fate, including a 5-2 defeat to the man who beat him in China last week – Ricky Walden.
Ninth seed Gould finished on the same amount of points as Graeme Dott and amateur Panompai Powises in his group but went out on frame difference.
Top seed and defending champion Mark Selby was the outstanding player of the round-robin stage, winning all five of his matches and losing just seven frames in the process.
He faces Doherty in one of the most attractive-looking last-32 ties.
Mark Selby  v Ken Doherty 
Graeme Dott  v Noppon Saengkham
Stuart Bingham  v Judd Trump 
Andrew Higginson  v Hossein Vafaei Ayouri
Mark J Williams  v Dominic Dale 
Tom Ford  v Marco Fu 
Barry Hawkins  v Saleh Mohammad (a)
James Wattana  v Shaun Murphy 
Lee Walker (a) v Issara Kachaiwong (a)
T Thirapongpaiboon v Thepchaiya Un-Nooh
Joe Perry  v Darren Morgan (a)
Jimmy White  v Ricky Walden 
Stephen Lee  v Matthew Stevens 
Steve Davis  v Mark Davis h2h
Aditya Mehta v Dechawat Poomjaeng 
Panompai Powises (a) v Rodney Goggins (a)
Final tables (top four qualify): Group A
What can we expect on snooker's big return? 'No fans, no fanfare, but large dollops of drama'
Selby on playing in a pandemic: 'It will be myself, my opponent and the referee'