Andy Murray overcame a stiff challenge from Janko Tipsarevic to reach the quarter-finals of the AEGON Championships.
The British number one had his serve broken in the first game of each set but he recovered with some aggressive tennis to beat the Serbian 14th seed 6-4 7-6 (7-3).
"It was a high-quality match. We both played well, especially at the end of the second set. It was a big test," said Murray.
Murray had questioned whether he should even be playing at Queen's Club this week after damaging his right ankle en route to the French Open semi-finals.
The 24-year-old admitted after last night's three-set win over Xavier Malisse that, in an ideal world, he would be resting this week and treating the damaged tendon.
But Wimbledon starts in less than a fortnight and Murray also needs time on grass courts in order to adapt properly from the clay surface at Roland Garros.
Faced with a Catch-22 situation, Murray decided to play in the hope he could manage the injury with strapping, a brace and anti-inflammatories.
"The ankle was the best it's felt today," he said.
Murray shared a 3-3 career record with Tipsarevic and knew he had to raise his game from the scrappy performance that accounted for Malisse.
The world number four did so to book a quarter-final against either Mario Cilic or Thomasz Bellucci, though he put himself in a difficult position at the start of each set.
In the first game of the match, Tipsarevic sealed the break when he pounced on a poor volley with a cross-court forehand. Murray challenged the call but Hawkeye technology ruled the ball was in.
Tipsarevic went on to consolidate the break with a confident first service game and he was mixing things up well, coming into the net on the back of some powerful forehands.
Murray was not altogether convincing in holding his second service game but he then broke Tipsarevic twice, either side of a rain delay, to take the first set.
A Tipsarevic double fault at 3-2 gifted Murray three break points and he clinched the game at the second attempt, when a backhand pass clipped the net and deflected past the advancing 14th seed.
The rain came with Murray leading 5-4 and he broke Tipsarevic again straight after the resumption to clinch the opening set.
Murray found himself on the back foot once again at the start of the second set as Tipsarevic moved a break up, on the back of some costly errors from the Scot.
But Murray began to crank up the aggression. He pushed Tipsarevic to deuce in the next game but the Serb held and then moved 4-2 up after eventually saving a break point.
Murray fired down a second serve ace at 133mph to make it 4-3 and then secured the break to get back on level terms and the set went to a tie-break.
Murray raced into a 4-1 lead in the tie-break as he dominated at the net. Tipsarevic went down fighting, with one extraordinary backhand, but Murray clinched the victory.
Andy Roddick had earlier booked a meeting with Fernando Verdasco after completing a 6-4 6-4 victory over South African Kevin Anderson.
Verdasco beat David Nalbandian 7-5 6-1 while Michael Llodra retired from his match against Jo-Wilfried Tsonga with a leg injury.
Tsonga will play either Rafael Nadal or Radek Stepanek in the quarter-finals.