Newcastle midfielder Yohan Cabaye has admitted he is worried about the extent of an ankle problem he sustained on international duty with France.
Cabaye started for his country in Friday's Euro 2012 qualifier against Albania and maintained his recent fine form with an eye-catching first-half performance.
However, he picked up an injury to his left ankle and, despite coming out again after the interval, had to be substituted in the 48th minute.
It is not yet known how serious the damage is and Cabaye has not been officially ruled out of Tuesday's key clash with Bosnia-Herzegovina at this stage, but the 25-year-old is pessimistic about the prognosis.
"I preferred to be substituted and not take any risk," he told L'Equipe.
"It was a big pain, and I fear ligaments could have been damaged."
Cabaye is set to undergo a scan on Saturday, along with Manchester United's Patrice Evra who was also substituted due to an injury.
Cabaye added on the French Football Federation's official website: "I hope I will be fit for Tuesday and that this game does not pass me by.
"I will have tests, I don't know whether it is a sprain or a bad bruise but it was very painful and I couldn't carry on like that."
Newcastle will certainly be hoping there is no major problem with Cabaye, who has been a revelation since moving to St James' Park from Lille over the summer.
The Magpies are unbeaten so far this season and will be looking to remain in fourth place when Tottenham come to Tyneside next weekend.