Having made a handful of point-blank saves with astonishing reactions on display, fans voted Guaita to win the award with 34.6% of votes going to the Spaniard.
Behind him was captain Gary Cahill, who took 17.5% of votes and Jordan Ayew closely followed with 15.6%.
This is already Guaita's second Man of the Match performance, having also claimed the accolade for his display against Wolverhampton Wanderers.
To re-watch more of Guaita's heroics against the Hammers, click here now for full highlights of West Ham v Palace. If you're reading in the app, just click 'Palace TV'.