Slaven Bilic’s men fought back from a 2-0 deficit to upset Mauricio Pochettino’s side to book their place in the next round of the competition.
West Ham 9/4 to beat Palace
The Ghana international scored a brace to level proceedings before Angelo Ogbonna scored the decisive goal.
And he has taken to the social media to hail his team for the feat, while also reserving praise for their supporters.
“Thank you God. Great team spirit. Great fans," Ayew wrote on Instagram.
A post shared by Andre Ayew “MOPAO” (@andreayew10) on Oct 25, 2017 at 6:21pm PDT