Osimhen is struggling with a hamstring injury sustained on international duty.
According to reports from Sports Digitale, the Super Lig champions plan to evaluate the striker immediately, with an MRI scan scheduled to determine the extent of the damage and shape his recovery plan.
Osimhen's injury occurred on Sunday night during Nigeria's 2026 FIFA World Cup playoff clash with DR Congo at the Crown Prince Moulay El Hassan Stadium.
The forward pulled up in the first half and was forced off at half-time, with Akor Adams coming on in his place. His absence proved significant, as Nigeria struggled to maintain control of the match.
The contest ended 1-1 after ninety minutes, but Nigeria faltered in the penalty shoot-out, losing 4-3. The result sent DR Congo into the intercontinental playoffs for a place at the 2026 World Cup, while Nigeria's campaign came to a bitter end.
It marks a historic setback for the Super Eagles, who have now failed to qualify for consecutive World Cups for the first time since they made their tournament debut in 1994.
For Galatasaray, Osimhen's condition is now a pressing concern. The club had been anticipating his return to reinforce their attacking options, but the focus has shifted to his fitness.
The upcoming MRI will be key in establishing both the severity of his hamstring problem and the timeline for his return to action.
