Athletic Bilbao’s hopes of advancing to the Europa League semifinals have been thrown into uncertainty as key forward Inaki Williams faces a race against time to be fit for Thursday’s decisive second leg clash against Rangers.

The Ghanaian international limped off during Bilbao’s 3-1 La Liga victory over Rayo Vallecano at San Mamés on Sunday, after suffering a strain to the adductor muscles in his left leg. His substitution came as a precaution, but initial signs suggest his availability for the crucial European tie is now in serious doubt.

“Inaki Williams had to leave the field before the end of yesterday’s match due to a strain on the adductor muscles of his left leg. He awaits further treatment,” read an official club statement.

The 29-year-old forward has been a standout performer for the Basque side in Europe this season, registering five goals in 11 appearances. His pace, experience, and attacking prowess have been vital to Bilbao’s campaign, making his potential absence a significant setback.

With the first leg in Glasgow ending goalless, Bilbao holds a slight home advantage. However, the potential loss of Williams could tilt the scales, as the Spanish outfit prepares to face a Rangers side known for its resilience.

Further medical assessments are expected in the coming days to determine if Williams will recover in time to feature in what promises to be a high-stakes encounter.