Celtic are due to meet Ibrox side Glasgow Rangers at Hampden Park later this afternoon.
Despite success, the Dutchman's Parkhead spell lasted just two years.
Fraser Forster and Pierre van Hooijdonk react on Twitter to Celtic's 3-2 win over Aberdeen.
The Scottish Premiership side ultimately decided against signing the Dutchman, instead going for another striker.
Pierre van Hooijdonk wants Nadir Ciftci to play a bigger role at Celtic.
The Scot will hope to lead Forest to victory this evening.
Pierre van Hooijdonk suggests that Celtic and Rangers should try to move to the Premier League.
Former Celtic striker Pierre van Hooijdonk has wished the Bhoys luck tonight.
Virgil van Dijk has left Scottish Premiership giants Celtic for Premier League outfit Southampton.
The former Celtic forward has urged caution when it comes to playing two up front.