Croatia forward Mario Mandzukic will miss Atletico Madrid's clash with Real Sociedad on Tuesday due to an ankle injury, his coach Diego Simeone said Monday.

Argentine Simeone said Mandzukic had been struggling with the problem for some time but could not put a duration on his lack of availability.

"It happened 10 matches ago, against Leverkusen, he turned his ankle," said Simeone.

"But he always maintained his consistency in every match. Against Leverkusen he played more than 80 minutes on one leg but with incredible commitment to the team."

Simeone said Mandzukic had gone to see him on Sunday to tell his coach that he was only playing at 70 percent and no longer felt able to give his all to the team.

"Tomorrow he won't play but we're hoping that when he comes back he can take his place (in the team)," added Simeone.

Atletico need Mandzukic, who has scored 12 league goals this season, to get fit quickly as they play Real Madrid in the Champions League quarter-finals on April 14 and 22.