MANCHESTER -- James Milner is a doubt for Manchester City's Champions League last-16 first leg with Barcelona after being ruled out of their game against his former club Newcastle with a knee injury.

City face an anxious wait to see if Milner, who has not trained all week, will be able to return in time for Tuesday's encounter with the 2011 European champions.

The England international has been one of the club's form players this season, making 33 appearances and scoring in last week's 4-1 win against Stoke.