STEPHEN Hendry closed in on the #40,000 first prize at the Thailand Open in Bangkok after Dubliner Fergal O'Brien had let him off the hook with one expensive blunder in a high-quality quarter-final.

The Scot, attempting to win his fifth title of the season, scored a 5-3 victory over O'Brien and today tackles Nigel Bond, who defeated Australian giant-killer Quinten Hann 5-0, for a place in tomorrow's final.

World champion Hendry had amassed 302 points, and 46 minutes had elapsed before O'Brien potted his first ball of the contest.

Runs of 80 and 44 got Hendry off to a flying start and he smoothly moved 2-0 ahead with a 123 which could easily have been converted into a 141 total clearance - the highest break of the event - had he not failed to roll a tricky blue across the baulk cushion into a bottom pocket.

When the Scot subsequently slotted home a respotted black from distance to forge into a 3-0 lead, O'Brien looked to be in desperate trouble.

The initial ray of hope for the Republic of Ireland World Cup player came in frame four when Hendry missed a green when poised for 4-0 and O'Brien grabbed the lifeline by clearing to pink.

Following the mid-session interval O'Brien tied the scores at 3-3 and stood on the threshold of a totally unexpected 4-3 lead when he fired in a 55 break at the start of frame seven.

However, with the tournament favourite looking decidedly vulnerable to a shock result, O'Brien jawed a black off its spot and Hendry, as he has done so many times in similar situations during his career, fashioned a superb 68 clearance to steal it on the black.

Not surprisingly, that setback shattered O'Brien's stubborn resistance and Hendry duly crossed the finishing line with a 53 break to record his twenty-fifth win in the last 27 world ranking event matches he has contested.

Yesterday's other quarter-final had seen world No.5 Bond guarantee an appearance in the last four of a ranking tournament for only the second time this season by whitewashing teenager Hann in just 82 minutes.

Hann had caused two major upsets by beating John Higgins and Mark Williams in the previous two rounds, and should have been entitled to be confident. However, the Melbourne cueman was under pressure from the outset and Bond, who dropped both of his frames against Hann when England overcame Australia in the quarter-finals of the World Cup four months ago, said: ''Quinten made one mistake in each of the first four frames and that was enough.''