Nemanja Vidic could miss Manchester United's game at Bolton on Saturday.
The 26-year-old defender is part of the Serbia squad whose Euro 2008 qualifier against Kazakhstan has been rescheduled for the same day.
The Group A match was due to be played last Saturday but had to be cancelled because of heavy snow in Belgrade.
However, if Serbia fail to beat group leaders Poland, or Portugal take a point from Finland on Wednesday, the Kazakhstan tie will be meaningless.
That would raise the possibility of Vidic being freed by his country to rejoin the United squad for their Premier League encounter with Gary Megson's Bolton.
United manager Sir Alex Ferguson will be loathe to lose Vidic, who has played in all but one of the club's league games this season.
After Saturday's postponement Uefa attempted to stage the qualifier on Sunday but with 14cm of snow still lying on the Partizan Stadium pitch, those plans also fell through.
