Atletico Madrid fear Luis Suarez won't appear again until next month.

Suarez pulled up with a muscle injury in training on Wednesday morning and he has since undergone medical tests.

The Uruguayan player, after feeling some discomfort in training, underwent tests by the club's medical services that confirmed the injury of the veteran striker.

Sport says there's now expectations that Suarez will miss the next three weeks.

The injury is a major blow, with Atletico stumbling at the top of the LaLiga table.