The 22-year-old set up the winner and was sent off for the Magpies. All in a day's work.
Indeed, boss Steve McClaren has confirmed that the 20-year-old is close to a St James' Park move, according to the Chronicle, and supporters are already thinking about how the Tyneside outfit can line up to suit the striker.
A case in point was the performance of Massadio Haidara during Newcastle's 1-0 friendly win over Sacramento early into the hours of Sunday morning.
Haidara's cross set up the own goal that settled the match and the 22-year-old made a number of brilliant deliveries throughout the encounter. Naturally, he received plenty of praise from fans on Twitter - although several still feel he needs to offer more tactically and positionally.
Reaction, then, was mixed but with the majority leaning towards the positive side. Especially when it comes to the possibility of Haidara being the perfect crosser for Mitrovic. There were plenty of opinions, too, on the Newcastle man's red card, with many - including McClaren - feeling it was a harsh decision.
Georginio Wijnaldum made his debut for the Magpies in the last 20 minutes of the friendly, although all eyes were still on Haidara here...
If Haidara keeps swinging crosses in like that big Mitro will have a field day! #Nufc— Sean Mitchell (@SeanMitchell91) July 19, 2015
Good win for #nufc last night. Nothing spectacular but all about fitness and improving the American brand. Good cross from Haidara for goal— Adam West (@SurreyMag) July 19, 2015
Just seen the Haidara tackle. Bit reckless and it probably is a red. He needs to learn not to jump in. #nufc— Danny Roberts (@dannyJroberts26) July 19, 2015
Haidara has terrible spatial awareness/ technique - constantly caught out by it #nufc— Michael Gallon (@MichaelGallon) July 19, 2015
Thought Haidara put some great balls in - He & Janmaat look like they could provide Mitrovic with some ammunition #NUFC— Black&WhiteBarmy (@BlackWhiteBarmy) July 19, 2015
I've said it so many times in the last week that we need a good LB Quality with pace , crossing , & a BRAIN Haidara , not good enough #NUFC— Shaker SH.ER (@Shaker_SH_ER) July 19, 2015
#Nufc Verdict is still out on Gini as we didnt see enough of him to pass judgment. Haidara did well in defence, but was "meh" in offence.— Kaare Christoffersen (@KaareKong) July 19, 2015
Haidara looks to of been given some encouragement to push on & he looks good, but he must recover & be aware of the ball in behind! #NUFC— #NUFC (@NUFC_FF) July 19, 2015