Welsh Open: Mark Williams survives scare against Kishan Hirani
World champion Mark Williams survived a scare to beat fellow Welshman Kishan Hirani 4-3 at the Welsh Open.
Williams had to work hard to beat Hirani, who is 120 places below him in the world rankings and in his first season as a professional.
Hirani, 26, took a 2-1 lead with a break of 126 before Williams secured victory in the decider in Cardiff.
England's Judd Trump beat compatriot Harvey Chandler 4-0, a day after winning the World Grand Prix.
Williams and Trump will be joined in the second round by defending champion John Higgins, who beat Graeme Dott 4-0.
"I could easily have lost that," Williams said. "I'm happy to get through but I've got to play a lot better."
Higgins will face Wales' Dominic Dale, who advanced after a 4-2 win against China's Li Yuan.
Jak Jones beat fellow Welshman Matthew Stevens 4-2 but Ryan Day is out after a 4-3 defeat against Thepchaiya Un-Nooh from Thailand.
Former world champion Shaun Murphy beat Adam Stefanow 4-1 while Peter Ebdon lost 4-0 to Germany's Lukas Kleckers.
Michael White lost 4-2 against Peter Lines and Jamie Clarke is also out after a 4-2 defeat by Matthew Selt