Mainoo came on to good effect for England in the 0-0 draw with Slovenia at Euro 2024, his second outing of the tournament, as he continues to build his reputation on the global stage.
Garnacho has still to feature in the Copa America for Argentina but is likely to be given a chance to impress for the World Cup holders.
There is, of course, stiff competition for this individual trophy, though, which was won last year by England and Real Madrid midfielder Jude Bellingham.