Andy Murray survived a scare to beat Gilles Muller and move into the semi-finals at the Aegon Championships at Queen's Club this evening.

The world number three suffered a first-set setback when Muller - 48th in the ATP rankings - inflicted a crucial break of serve to go 3-1 up en route to a 6-3 win.

Nothing could separate the duo in the second set as both players won six games apiece to force a tie-break, which Murray dominated and won 7-2 to level up the match.

The Scot broke the Luxembourg native in the opening game of the decider to establish an early foothold - one that helped him into a 5-3 lead.

Muller won his serve to keep alive hopes of a last-four place, but Murray served out the match to reach the semis.

Murray will face Viktor Troicki or John Isner in the next round.