Everton full-back Nathan Patterson is facing a six-week spell on the sidelines after suffering a knee injury.
The 21-year-old was forced off just an hour into the Toffees heavy 4-1 defeat to Brighton & Hove Albion on Tuesday evening.
The injury to the right-back comes as a major blow to under-pressure manager Frank Lampard, as his side are winless in six Premier League matches, and sitting just one point above the relegation zone.
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