Celtic's good run of form came to a crushing halt today, as Dundee United defeated the Hoops in a 2-1 victory at Tannadice thanks to goals from Nadir Ciftci and Stuart Armstrong.
Leigh Griffiths did pull one back for Celtic late on, but it wasn't enough to generate a draw, meaning Ronny Deila's men are now just four points clear at the top of the Scottish Premiership table.
Griffiths goal was significant in the Celtic striking pecking order, as John Guidetti went another game without a goal as his recent poor performances begin to draw criticism from fans - and now his manager.
Deila confirmed after the game that after recent goals from Griffiths and Stefan Scepovic, Guidetti could be dropped from the starting line-up - but did add the caveat of the Swede's fitness problems.
"Could Guidetti’s place be under threat? Yeah,” said Deila. "We have big competition in the team, we need all the strikers we have. We play with the players we think are the best to win games."
"There is one thing you have to remember with John; he hasn’t played football for two years before he came here. He started very well and now he has had a little dip. That is because he has to be physically stronger and play matches over time," he continued.
"All strikers go through periods like this but we have to focus on what is going to get him out of this situation." added the Norwegian.
Guidetti has so far been outstanding for Celtic, but recent games have seen his production slip amid interest from Hull City, Inter Milan and Marseille, and Deila may now take the decision to rest Guidetti in the coming games in a bid to keep him fresh and get him back to top form.