Now, the possibility of an Old Firm derby in the semi-finals could await the Bhoys - and the Swede says whoever his side face will be 'going down.'
"Of course it would be a fantastic game to be a part of. Whatever happens, happens," Guidetti said after the game.
"Come Hampden Park, 11 people standing in front of us, they are going down. Hampden Park will be amazing, no matter who we play. I am excited about every game for Celtic.
"We all know [a Rangers clash] is a special game. This is a game I woke up at 11.30am when I was a small kid to watch. It is fantastic, very spicy and you see that it means a lot. The atmosphere is amazing, you can hear it through the television.
"But we need to stay focused. There are four good teams left in the cup and this club deserves trophies so hopefully we can do this."
Needless to say, Celtic fans are delighted at both the Swede's form and his promises to 'down' Rangers. So much so that some fans are already comparing him to Henrik Larsson. Many feel the Manchester City loanee is yet to earn those comparisons but several Bhoys supporters have drawn the link on Twitter.
Here are the best reactions to the 22-year-old's hat-trick on social media...
Guidetti saying he wants to get his teeth into rangers..going the right way about being a cult hero for the hoops #celticfc— KevinMcAneney (@83Ways2SkinACat) October 29, 2014
Does super guidetti have the potential to be our next henrik Larsson?— Jimmy Sando (@kiwiscotsman) October 29, 2014
I fall in love too easily but John Guidetti might be my first love after Larsson if he keeps this up!— Paul Ferguson (@weepaulferguson) October 29, 2014
We've got to sign Guidetti the guys the new Larsson!— Barry-Bhoy (@Barry_John_1967) October 29, 2014
I'm growing Larsson like feelings for John Guidetti— Paul Lynch (@MrSaxoLynch) October 29, 2014