The 20-year-old came on for the Bhoys against a side he was only recently playing for.
And Christie has heaped praise on the duo (alongside himself), suggesting the three of them - along with Celtic's other youngsters - represent a bright future for the Parkhead outfit.
RC: "Me, Scotty and Patrick are all similar players. We want to show a bit flair and get forward on the ball." (MH)— Celtic Football Club (@celticfc) February 20, 2016
RC: "I can definitely see a bright future with the amount of young talent we have." (MH)— Celtic Football Club (@celticfc) February 20, 2016
Celtic's win has them six points clear of Aberdeen in the Scottish Premiership, also boasting a far superior goal difference as they sit at the top of the table.
And the claim of a bright future at Celtic certainly isn't a false one. The Hoops do boast plenty of promising young talents.
It's simply a case of using them and giving them game time. Roberts, meanwhile, is a loan signing, and may therefore take some attention away from the Bhoys' more homegrown youngsters.
He should be with Celtic for a while, though, and should have plenty to offer Deila's men.