Arsenal midfielder Cesc Fabregas has started training again from his hamstring injury that has kept him out of the first team since the 27th of November.
Robin van Persie, Alexander Helb and Mathieu Flamini also trained with Fabregas on Friday.
Florent Malouda (knee) and Ricardo Carvalho (back) could make it back if they pass a late fitness test.
Michael Ballack (ankle) and Didier Drogba (knee) are still injured and will not feature. Michael Essien is suspended and will take no part in sunday's match.
Chelsea needs to score 3 more goals than Arsenal to overtake them on the Premier League table.
Arsenal midfielder Cesc Fabregas has started training again from his hamstring injury that has kept him out of the first team since the 27th of November.
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