The slip up could prove costly for the Amsterdam side as they failed to capitalise on Feyenoord's draw
Ajax goalkeeper Andre Onana was left red-faced on Sunday after an embarrassing slip up that could have a big say on his side's title chances.
After seeing Eredivisie leaders Feyenoord lose thanks to a Mathias Pogba header, the Amsterdam side had a chance to move to within two points of first place when they took on Groningen.
But 10 minutes into the second half, disaster struck as ex-Barcelona shot stopper Onana was caught in possession by Bryan Linssen.