The three-time Grand Slam champion's ominous message to his box came after spurning a vital break point in the second set.
Murray lost two out of three tie-breaks against 18-year-old Mensik as his Doha adventure ended at the last-16 stage.
The Scot set up his match with 116th-ranked Mensik courtesy of a win over Alexandre Muller on Tuesday his first victory since October.
But Murray's relief did not last long as he crashed out 6-7 7-6 6-7.
Denne historien er fra February 22, 2024-utgaven av Daily Record.
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Denne historien er fra February 22, 2024-utgaven av Daily Record.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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