Former world champions Mark Williams and Graeme Dott both exited the Coral Shoot Out at the second-round stage.
The tournament at Watford Colosseum is a ranking event for the first time, and the one-frame format has led to some unpredictable results.
Welshman Williams had to wait until the final match of the evening against fellow veteran Andy Hicks but was unable to convert an early lead into victory.
Dott was beaten by Li Hang of China and there were also defeats for Barry Hawkins, Ricky Walden, Michael White and Robert Milkins.
Ashley Hugill, Luca Brecel, Steven Hallworth and James Cahill were among those to make it through to round three.
The likes of Jimmy White, Mark King and Shaun Murphy will also be in action on Sunday after winning their second-round matches on Friday night.
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