Essex teenager Emma Parker lost out to India's Laxman Rawat in the first round of the Snooker Shoot Out in Watford.
The 19-year-old, top of the women's under-21 rankings, was on a break of 16 when she missed a red into the centre and Laxman secured a 61-17 win.
The other woman in the event, 11-time women's world champion Reanne Evans, lost to Jimmy White on Thursday.
Sixteen-year-old Ryan Davies beat Robbie Williams, while 2005 world champion Shaun Murphy ousted Mark King.
Belgium's Luca Brecel made a 74 to beat Farakh Ajaib of England and join 14-year-old compatriot Ben Mertens in round two.
A 72 from Jak Jones of Wales saw off 14-year-old Scot Liam Graham, while Kishan Hirani of Wales won by one point, having been 54 ahead against Yan Bingtao, who missed an attempted yellow as the end of match klaxon sounded.
Left-hander King conceded a foul when no ball touched a cushion from his safety shot, helping Murphy to a 52-12 win.
Martin Gould, winner of the event in 2013, made a 100, his third century in the format, in defeating Liam Highfield.
The live second-round draw pitted White against world number 110 John Astley, Murphy against another former world champion in Stuart Bingham and holder Michael Georgiou against Li Hang.
Shoot Out matches are one frame and a maximum of 10 minutes. Any foul allows the opponent to place the cue ball where they wish, with 15 seconds per shot permitted for the first five minutes of the match and 10 seconds per shot for the final five.