By Matt Rich
Neither man was at his best with the world number one the only player to clear 50 which he did twice with breaks of 52 and 82. The result means he faces the tour's form player, Stuart Bingham, in the quarters.
"I'm obviously happy to win, but I think the scoreline was a bit flattering," said Selby at the end. "Jamie probably could've pinched two frames, the second and the third frames. It was a strange game because I didn't really play that well. I went 2-0 up and then, I don't know what it was, Jamie just seemed to stop trying and I seemed to lose my concentration a little bit. We more or less dragged each other down."
Joe Perry fell agonisingly short of completing an incredible comeback from 4-0 down against Ricky Walden, losing 5-4 in a match that went down to the final black.
In a marathon four hour and 45 minute struggle, Walden raced into a 4-0 lead, scoring breaks of 67 and 64. He made a 64 in the next but Perry came back to win it and that turned the match as he fought back to 4-4.
It was a tense final frame which went on until nearly 1am and in which both players showed the strain, missing shots they would otherwise pot. Perry missed the black and Walden stepped up to save the match and his blushes. He now faces Rob Milkins in the quarter final stage tomorrow evening.
"I'm just happy I put up a fight in the end," Perry said magnanimously afterwards.
Graeme Dott also survived a scare against Rod Lawler to make it through to the quarter-finals eventually winning the match 5-4.
The Scot was 3-1 up at the interval but Lawler fought back after the break to lead 4-3, recording a 54 in the seventh, but he missed the final red which was over the corner pocket in the eighth to hand Dott the frame. The 2006 World Champion made sure of the win with a break of 85 which added to the 50 and two 55s he made earlier in the match, and set up a meeting with Mark Davis tomorrow.
"It was a strange game," said Dott. "From 3-1 up I thought I was a bit unlucky not to win the match 5-1 or 5-2. I think the balls went against me at that point. But then I was quite lucky and managed to get through the match eventually."
About Lawler's miss in the eighth Dott said: "That was me beat really, I'm very surprised he missed it because I thought, even coming off the cushion, that it wasn't that hard a shot. But match ball can be quite hard to get sometimes so luckily for me he missed it."
"It's a hard match," he said of his next round fixture against Davis. "Mark's a great player. He's been here long enough to know what he has to do, so it'll be another tough match."
Davis got past the challenge of Jamie Burnett with a 5-3 win. Burnett's only high was a 67 in the fourth which levelled the contest going into the interval. But he only managed one more frame afterwards as the English cueman clinched it with a break of 68 to take him forward in the tournament. Davis had posted breaks of 57 and 64 in the opening two frames and did well not to get flustered when the Scot twice levelled.
Ball by ball scoring and results from tournaments