Kevin De Bruyne is reportedly ruffling feathers at Napoli and could spell trouble for Scott McTominay.
The Belgian's arrival has apparently caused a 'rift' in Antonio Conte's team because the entire system has been adapted to suit him - but only to mixed effect.
And his raging response to being substituted in the 2-1 defeat at AC Milan on Sunday, despite scoring, has raised a key question: is McTominay's sacrifice worth it?
There is no doubting De Bruyne's timeless quality. As he intended, the 34-year-old is showing Manchester City that are missing out - already he has scored three goals, including a free-kick on his debut against Sassuolo.