Jerome Boateng faces a race against time to be fit for Bayern Munich's Champions League semi-final with Atletico Madrid but took part in a full training session on Monday following a groin injury in January.

The 26-year-old defender suffered the injury in Bayern's first league game of 2016, a 2-1 win over Hamburg and had planned his return for mid April.

But Bayern coach Pep Guardiola has said he does not know if Boateng will be fit to play in their Champions League semi-final, first leg clash at Atletico Madrid in ten days time, with the return leg in Munich on May 3.

"I'll only make my decision after I see how things are," said the Spaniard ahead of Bayern's German Cup semi-final on Tuesday at home to Werder Bremen.

"He has been injured for three months and he needs some conditioning."

If fit he is a shoe-in for the Germany team at the European Championships in France from June 10-July 10.