John Higgins was defeated 4-3 by Gary Wilson in a superb tie and Neil Robertson lost out 4-3 to Robert Milkins.
Williams earned his spot in this evening’s last 16 with a 4-1 win over Sunny Akani. That was the first frame the Welshman had lost this week, but he faced a sterner test this evening against Gilbert.
They went blow for blow in the early exchanges, with a break over 50 in each of the first five frames. Gilbert fired in contributions of 67 and 74, but Williams made breaks of 52, 79 and 63 to move to the verge of victory at 3-2. He got himself over the line and booked a quarter-final clash with Mike Dunn.
“I’m sure everyone left in the event is thinking that this must be their best chance to win a tournament,” said the two-time World Champion. “You try and win every tournament you play in. If I win here on Sunday brilliant. If I Iose tomorrow it doesn’t make any difference. You just have to try your best.”
Robert Milkins followed up his superb win over Robertson with a 4-2 defeat of three-time ranking event winner Ricky Walden.
Milkins has reached ten ranking quarter-finals in his career and appeared in a further six semi-finals. However, he admits that with several big names falling by the wayside this week is a chance to go further.
“There’s a big opportunity, but there is a long way to go and I don’t want to put too much pressure on myself,” said the 41-year-old. “All I’ve ever wanted to do is win a tournament, even then I’m feeling nervous and this is just the last 16.”
Teenager Yan Bingtao came through late night thriller against Ryan Day 4-3 and will now face Milkins in the last eight. Mike Dunn set up his showdown with Williams thanks to a 4-1 defeat of 2014 Players Champion Joe Perry.
Elliot Slessor backed up his defeat of O’Sullivan with another 4-1 win, this time over Sam Craigie. Liam Highfield’s run was ended by China’s Lyu Haotian.