Germany's attacking midfielder Marco Reus looks doubtful for the World Cup starting next week after suffering a partial ligament tear of his left ankle ligament in their final warmup against Armenia on Friday, the team said on Saturday.

Reus turned his ankle shortly before the break in their 6-1 victory in Mainz and was taken to hospital where his injury was diagnosed. A final decision will be taken later in the day.

"As regards his (World Cup) participation it is something that is still open," the German team said in a statement on Saturday. "Further decisions will be taken at a later time today."

"He suffered a partial tear of his anterior ligament above his left ankle."

Germany, who take on Ghana, Portugal and United States in Group G, leave for Brazil on Saturday evening.

The lightning-quick Reus, who enjoyed a superb season at Dortmund, was seen as a key player in Germany's quest to claim their first international title in 18 years.

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