Despite being just 22, it's already been quite the career for John Guidetti.
From being signed by compatriot Sven-Goran Eriksson for Manchester City to being involved in a pre-contract wrangle with FC Twente, from smashing 20 goals in just 23 games for Feyenoord to almost having his career ended by an illness affecting his central nervous system, it's fair that Guidetti's career has been eventful even if it is still in its infancy.
After recovering from that illness, Guidetti was loaned out to Stoke City for the second half of last season, but he played just six times under Mark Hughes, failing to score for the Potters.
That left Guidetti in limbo this summer. He wasn't going to break into the City side with the likes of Sergio Aguero and Edin Dzeko around, but he was still yet to prove that he had fully recovered enough to play first team football.
So far, Deila's faith has been repaid. Guidetti has scored five goals in just seven games for the Bhoys, leading Norwegian Deila to announce that he wants to bring him to Glasgow on a permanent basis.
Well, those hopes have been dealt a blow after it was today revealed that Manchester City want £5m for Guidetti - despite his contract expiring next summer.
In any normal situation, a club would be willing to sell the player off for a knockdown price in order to avoid losing him for nothing, but given City's wealth - and the knowledge that if Celtic don't pay it, somebody else will if he carries on scoring - they're actually in a position of power.
In Celtic's case, they must try to wait before rushing into spending such a large amount of money on Guidetti. He's had his fair share of health concerns in the past, and until Celtic know that they are 100% behind him, it would be naive to fork out £5m for him almost immediately.
Guidetti's goalscoring may be reminiscent of his compatriot Henrik Larsson at this early stage, but whilst his prowess in front of goal may not be questionable, his health is. Waiting until the January transfer window and evaluating the situation would be the best course of action for the Hoops.