Wojciech Szczesny has reportedly limped out of Poland's training session ahead of the team's friendlies against Slovakia and the Republic of Ireland.
The Arsenal goalkeeper, 23, is said to have aggravated an ankle injury.
Szczesny suffered the problem as the Poles met up for the first time before Friday's encounter with Slovakia in Wroclaw, according to ITV Sport.
The keeper has won 15 caps for his country since making his debut in 2009.