Arsenal slumped in the Premier League game on Monday, losing 0-3 to Crystal Palace.
Arsenal conceded the first goal in the 16th minute. Ben White fouled Zaha near the eighteen yards arena.
Conor Gallagher curved the free kick into the box, which was headed by Joachim Andersen towards Mateta for a nod into the net.
The second goal caame through Ayew in about the 24th minutes.
Arsenal conceded a penalty in the 74th minute which was converted by Zaha.
Arsenal will have to struggle harder to find themselves in the fourth place of the League table to qualify for the champions league next season.