FRANKFURT (Reuters) -- Sebastian Kehl's place in Germany's World Cup squad could be in doubt after the midfielder suffered an ankle injury on Saturday.

"It could be a ligament tear," Dortmund sporting director Michael Zorc told reporters.

Kehl suffered the injury late in a 1-1 draw against Eintracht Frankfurt in the Bundesliga and was due to have further tests on Sunday.

The 26-year-old made his comeback for Germany after a long absence in a 4-1 win over the United States in March.

Juergen Klinsmann names his World Cup squad on May 15. The hosts get the World Cup underway with a Group A match against Costa Rica in Munich on June 9.

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