Huge risk with Kovacic's past injury niggles.
No doubt from he he could do the role, but he has missed a lot of games in the past seasons.
I wouldn't judge past injuries too much, other clubs have a habit of running players into the ground, see Haaland at Dortmund. It's definitely something to consider but we have one of the best medical teams in the world. Also Rodri wont need a rest every week, he's too important, just will need one on occasion.