Roger Federer lost his second match since returning from a 14-month injury lay-off, going out to Nikoloz Basilashvili in the quarter-finals of the Qatar Open.
The 20-time Grand Slam winner was overcome by Georgia's Basilashvili 3-6 6-1 7-5 in Doha.
Federer had beaten Britain's Dan Evans on his return to action on Wednesday to reach the last eight.
Basilashvili saved a match point before going on to beat the Swiss 39-year-old.
After Federer missed his chance of victory in the 10th game of the deciding set, world number 42 Basilashvili went on to break the three-time Qatar Open winner in the ensuing game and eventually prevailed in one hour and 50 minutes.
Federer, in competitive action for the first time since January 2020 after two knee surgeries, said playing two matches in two days was "a good stepping stone" in his recovery.
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