Nick Kyrgios suffered a blow to his Wimbledon hopes as he was forced to withdraw from the Aegon Championships at Queen's Club because of injury.
The 22-year-old Australian, ranked 20th in the world, was playing American Donald Young in the first round when he slipped and fell at the baseline.
After courtside treatment to his hip, he continued until the tie-break, but retired after Young took it 7-3.
Kyrgios withdrew from recent events in Monte Carlo and Rome with a hip injury.
"This is a big tournament but I think when you've got Wimbledon, or any of the Grand Slams, looming, you don't hang in there," former Davis Cup captain John Lloyd told BBC Sport.