Celtic are looking for a response this evening as they take on Dutch giants Ajax in the Champions League in Amsterdam this evening.
A 2-1 defeat at the hands of Aberdeen on Saturday has piled the pressure on manager Ronny Deila, with his side sitting five points adrift of the Dons at this early stage of the season.
They now face a daunting task in their first game of the Europa League group stage, as they travel to the Amsterdam Arena to take on Ajax.
Few expect Celtic to get something out of the game considering their recent form, but former Bhoys forward Pierre van Hooijdonk has offered a message of support to Deila's men on Twitter.
Van Hooijdonk - the agent of current Celtic striker Nadir Ciftci - hit 56 goals in 92 games for the Bhoys during his time at the club, and is no strange to Ajax.
The Dutchman regularly faced Ajax with the likes of Vitesse, Feyenoord and NAC Breda, with his commitment to Feyenoord meaning he would no doubt love to see Celtic beat Ajax this evening.
It won't be easy for Celtic, but Deila needs a result tonight after a week of intense pressure from fans and the media, making this a huge clash for the Norwegian manager.