Callum McGregor has welcomed the challenge of Tomoki Iwata for his position after the Japanese player joined Celtic.
The Celtic captain is a dead-cert starter for the majority of matches under Ange Postecoglou - but Iwata has played in a similar role previously.
It's unlikely Iwata would force McGregor out of the team, but it could see a shift in position or at least competition for the deep-lying midfield role.
