Marin needs a new coach
I have been thinking about this for some time and todays match just proved it. He definitely needs a new coach, one that can motivate him and most of all raise him psichologicaly.
I don't think he has anything to learn from Bob Brett anymore nor is he showing any game improvements (except bit on first serve and net play, but some shots like the forehand have significantly declined).
Not sure who it should be, but i don't think it should be Ivanisevic. Someone experienced in coaching and a motivator. He needs someone to bring him over this wall he is facing in the last year or so.
Fan list: Cilic, Federer, Dodig
Like/respect list: Nadal (every Federer fan should respect him and vice versa), Ferrer, Soderling, Kohlschreiber, Karlovic, Almagro, Nishikori, Dolgopolov
P.S. Watch out for Donna Vekic and Borna Coric, 2020. Hopman cup winners.