Spain defender Carles Puyol could be out of UEFA EURO 2012 after Barcelona announced he required knee surgery.
The 34-year-old experienced discomfort after Saturday's 4-0 defeat of Espanyol and will now go under the knife.
On the club's official website, Barça explained Puyol decided to "undergo an arthroscopy on 12 May" and that the approximate recuperation period is six weeks.
Puyol is definitely out of Barcelona's final La Liga game at Real Betis at the weekend and will also miss coach Pep Guardiola's last game in charge - the Copa del Rey final against Athletic Bilbao on 25 May.
And his participation in Poland and Ukraine is also extremely doubtful.
Spain coach Vicente Del Bosque will announce a provisional squad on 15 May, which will then be whittled down when the final party is confirmed 12 days later.
The world and European champions open their campaign against Italy on 10 June, before going on to play Republic of Ireland and Croatia in Group C.