Man United resume their Premier League campaign against cross-town rivals Manchester City on Sunday.
And ahead of travelling to the Etihad, Man United have shared a fascinating clip from Wednesday's training session.
The footage shows Jones scoring from a stunning Ronaldo assist, with the surprising sequence sending fans into overdrive.
One supporter tweeted: "Finishing more clinically than our attackers have done for the past month or so!"
A second wrote: "'Phil Jones scoring with a Cristiano Ronaldo assist.' I bet nobody has ever thought about this sentence before."
A third joked: "PHIL JONES IS GOING UP FRONT."
A fourth added: "So Phil Jones is the answer to getting the ball in the net. Who knew?"
Jones' goal in training comes after Ralf Rangnick's team fired blank against Watford in their last league match.
Ronaldo's recent form in front of goal has been below his usual high standards, with the 37-year-old ending his baron spell with a goal against Brighton last month.
In order to return to his prolific ways, the Portuguese superstar has reportedly told Rangnick to switch the formation so he can have a strike partner.
Could Jones be the answer? Well, obviously not, but the training clip didn't stop Man United fans from having a bit of fun on social media.
Jones, meanwhile, played his first league match for two years when he started in his side's defeat to Wolves in January.
As mentioned above, fourth-placed Man United face Man City on Sunday as they continue their fight for a spot in next season's Champions League.
Featured Image Credit: Manchester United
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