Do you think Marcus was actually on his phone 15 minutes after a final loss? He’d have been getting his medal and dealing with his media obligations.
It was his PR team. Of which he has signed with Rocnation. His new GF works in PR. And Manchester United have hired Neil Ashton, the former PR spin doctor for The Sun newspaper.
No that's a fair point, he may not have been on his phone. There is around 15mins between the footage of him sat on the bench and him getting and taking off his medal, so maybe it was his PR company, maybe it was him.