Former world number one Higgins was always in charge against Ding

John Higgins booked a semi-final tie against defending champion Mark Selby after staying cool to get the better of Ding Junhui with a 6-4 victory.

Higgins was never behind but China's young prospect Ding pushed him all the way in an entertaining match.

The Scot took a 3-1 lead into the mid-session interval and managed to pull clear after Ding pulled it back to 4-4.

Earlier, Selby progressed after a very closely fought 6-5 victory over Northern Ireland's Mark Allen.

The Englishman came from 4-2 and 5-4 behind to see off Allen's challenge - five of his six Masters matches have now gone down to the final frame.

"I keep playing these last-frame deciders, I guess it does show I'm good under pressure," Selby told BBC Sport.

"It was really hard to play against Mark. You can play a couple of great safety shots and soon after find yourself 70 points behind in a frame.

606: DEBATE Can Selby regain the Masters title?

"But I've got nothing to lose. I have come as defending champion, but it's still only my second time here, so I'm just trying to enjoy it.

"To be still in with a chance of winning at this stage is a great feat, I think."

Selby recovered from a shaky spell early on and fought back when Allen was within one frame of victory - but also got his share of luck in the deciding frame as he fluked a red while escaping from a snooker.

"I couldn't believe it happened," the 25-year-old added. "I said to Mark 'I can't believe you left me that'. There was great banter out there."

Experienced Higgins displayed his superior class and composure against Ding, no more so than when the 21-year-old levelled at 4-4.

After coming so close to taking a 5-3 lead, Higgins took control in the ninth frame with a clearance of 127 before closing out the match in the next.

In Friday's two quarter-finals, Stephen Maguire takes on Neil Robertson and Ali Carter meets Ronnie O'Sullivan.

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