Australia's Nick Kyrgios said he is "100%" optimistic about playing at Wimbledon despite withdrawing from the Aegon Championships at Queen's Club because of injury.
The 22-year-old was playing American Donald Young in the first round when he slipped and fell at the baseline.
After courtside treatment to his hip, Kyrgios 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.
"It just was a sharp pain when I fell," said the world number 20.
"I started feeling it when I was walking, when I was landing on my serve.