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Murray beat Alexei Popyri in his 1,000th match on the ATP Tour to tee up his contest with Thompson, who broke the Scot's serve in the very first game.

Five-time Queen's champion Murray looked uncomfortable right from the off and asked for a medical timeout after holding in the third game, receiving treatment on his back and hip.

He attempted to continue but had to retire just two games later, giving a rueful look as he waved farewell to the crowd.

Murray has repeatedly said he is likely to retire later this year, though he has expressed a wish to play at both Wimbledon and the Olympic Games in Paris, for which he was included in Team GB's squad on Monday.

Wimbledon begins on 1 July, with Murray hoping to appear at a fourth straight edition of the competition he has won twice, after sitting out the 2018 and 2019 tournaments.