Andy Murray set up a titanic Wimbledon final showdown with Novak Djokovic as the world number two beat Polish 24th

seed Jerzy Janowicz 6-7 (2/7), 6-4, 6-4, 6-3 in a bad-tempered last four clash on Friday.

Murray remains on course to end Britain's 77-year wait for a male winner of the Wimbledon singles' crown, but the Scot had to do it the hard way once again.

Just 48 hours after battling back from two sets down to defeat Fernando Verdasco, Murray survived an early pummelling from Janowicz and then a controversial decision to shut the Centre Court roof due to bad light when he had just taken a two-sets-to-one lead.

Murray was furious with Janowicz, who had been pleading for the roof to be shut, and referee Andrew Jarrett,

claiming there was still time to finish the match in daylight.

But he returned to finish the job, sealing his second successive appearance in the All England Club final thanks to 20 aces and 18 winners in two hours and 52 minutes of nerve-wracking action.

Murray, who missed the recent French Open due to injury, has now reached the final in each of his last four Grand Slam appearances.

However, that will mean little to the 26-year-old unless he avenges last year's tearful final defeat against Roger Federer and emulates Fred Perry's 1936 Wimbledon triumph.

Murray's seventh Grand Slam final on Sunday will be his fourth meeting with world number one Djokovic with a major title on the line.

The Serb defeated Murray in the 2011 and 2013 Australian Open finals, while the Scot won a five-set thriller to seal his maiden Grand Slam title at the US Open last year.

Murray was appearing in his fifth

consecutive Wimbledon semifinal and had won his previous 16 matches on grass, while Janowicz was making his Grand Slam last four debut.

But the 6ft 8in Janowicz, who was ranked outside the top 200 last year, came out all guns blazing.

Firing down one 139mph rocket in his opening service game, Janowicz's booming deliveries regularly topped the 130mphmark.

Murray failed to convert two set points at 5-4 and Janowicz took advantage of that escape in the tiebreak, racing into a 4-0 lead and sealing the first set thanks to a Murray double fault.

Murray needed an immediate response and he got it with a break in the opening game of the second set.

Even then Janowicz ensured nothing came easily for Murray before he finally levelled the match at one set all.

With darkness closing in Janowicz broke for a 3-1 lead in the third set. But a fortunate net-cord gave Murray a break at 4-2.