Defending champion Judd Trump bemoaned his lack of sharpness after reaching the third round of the English Open with a 4-2 win over Jimmy Robertson.

Trump saw his 2-0 lead cancelled out before seeing off Robertson to set up a last-32 tie with Steven Hallworth in Milton Keynes.

"I let him back into it and I'm still not quite match sharp," said Trump, who compiled breaks of 73 and 111.

"I seem to get 2-0 up in every game I play and need that kick in the backside to really get going again.

"In the end it was a good win. I haven’t had that many games and the confidence isn’t there from winning.

"There’s been a little lapse of concentration and you’re not going through 4-0, it’s 2-2."

Mark Selby overpowered Jamie Wilson 4-1 and Barry Hawkins edged out Jak Jones 4-3 to make the round of 32.

Anthony McGill whitewashed Gerard Greene 4-0, while Kyren Wilson defeated Ashley Carty 4-2.

In the evening session, John Higgins beat Oliver Lines 4-0 and Stephen Hendry lost by the same margin to Chris Wakelin.

Four-time world champion Higgins said: "I don't think I’ve hit the ball better than I’ve done just now. I think I’m a better player.

"I don’t look back on my wins and things in the past, but right now with the way I feel in my game I think I’m as good a player as I’ve ever been and maybe even better I would say."