He takes weekly 15-mile bike rides with his grad students and has torn both of his anterior cruciate ligaments slide-tackling undergrads in soccer games.

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Gyan's arrival comes on the day it was announced that striker Fraizer Campbell will be out for at least six months after rupturing cruciate ligaments.

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Midfielder Andy Parkinson made his first appearance for the U's since damaging cruciate knee ligaments back in August.

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He has been out since damaging cruciate knee ligaments in the EDF Energy Cup win over Saracens in March.

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Powell has already lost England's most influential player, striker Kelly Smith, who has been ruled out with a cruciate knee ligaments injury.

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