What happened between Kohli and Kane ? Did Kane provoked him first ? Kohli's press conference certainly made it more of a controversy he's probably frustrated but should have handled it better.
Unnecessary by him, i think and still do that he's more of a composed man then for say Ben Stokes. Remember his series against us in 2012-13 didn't went well for him but he acted nothing like he did this time with dip in form.