Iwobi made the trip with the squad to the match but was he was an unused substitute as coach Carlo Ancelotti welcome Dominic Calvert-Lewin back starting line up.
A Bernd Leno’s own goal was all the Toffees needed to earn the maximum three points against the poor Mikel Arteta’s side.
The victory saw Everton established six points gap ahead of Arsenal, despite playing a game less.
Arsenal has now lost 13 matches in the Premier League this season, not since 1994-95 (17) have they been defeated more times in a single league campaign.