The Frenchman took to the field wearing his No. 10 jersey, but had strangely drawn "+5" in marker to the right of the number.
Pogba has yet to explain exactly why he had done this, (because, well, he is playing) but one working theory put forward on Twitter is that together the three numbers (1, 0 and 5) add up to six—his previous squad number.
We're open to new theories though, so fire them at us. Paper shortage for a quiet math genius? Falling out with Juventus' kit man?
UPDATE: Monday, 26 October
The latest theory to hit the internet is that Pogba was making a tribute to Brazilian legend Pele, who celebrated his 75th birthday on Friday.
It remains to be seen whether Pogba will verify the reports or leave the gesture as a personal tribute.