It was an excellent first day for the Welsh players, as Jak Jones, Dylan Emery and Mark Williams all won their first-round matches.
Jones took a comfortable 4-1 win over England’s Liam Highfield, while Emery shocked China’s Lei Peifan with a deciding-frame victory.
Home favourite Williams – who was the last Welsh player to win the title back in 1999 – overcame Michael Holt to win 4-2 and set up a second-round match against Martin O’Donnell or Tom Ford.
England’s Robbie Williams knocked out world number 16 Si Jiahui with a 4-2 win.
Williams will face last year’s runner-up and former Welsh Open winner Stephen Maguire in the second round after his come-from-behind win over Ricky Walden.
Barry Hawkins was forced to go the distance against fellow Englishman David Lilley, though the 12th seed came out on top with a 4-3 win, sealing his win with a 108 break in the decider.