Mirotic left Milan and signed with Monaco.

He's a truly quality player. His lack of a EuroLeague title is another matter.
I don't think he'll win a EuroLeague title with Monaco, but he chose Monaco.
Had he transferred to Hapoel or Dubai Basket, which have strong rosters, he might have had a shot at the EuroLeague title.
My EuroLeague champion contender this year is Hapoel Tel Aviv.