The Brazilian midfielder was omitted from Frank Lampard’s squad at Villa Park.
Tom Davies replaced Doucoure while Amadou Onana - who signed from Lille for up to £33.5 million earlier this summer- made an impressive impact late on.
Lampard will be hopeful Allan is available for next weekend’s clash against Nottingham Forest.
A post on Everton’s Twitter account read: “Allan misses out on today’s matchday squad with a minor knock.”
Lampard confirmed Allan has a foot issue in his post-match press conference.
Meanwhile, there was no Andre Gomes again for Everton. The Portuguese has been injured since the Toffees’ pre-season tour of America, according to Lampard.
Jean-Philippe Gbamin was fit but not selected in the match-day squad.