He's very arrogant, he's very aggressive when he fields, and when he bats as well. He's just a very aggressive person.
Source, in full
Lendl Simmons after winning the man of the match of West Indies' victory over India in the ICC World Twenty20 2016 semi-final, expressing on the arrogancy of Virat Kohli that motivated him to play a match-winning knock in Mumbai. He quoted it to Espncricinfo 'Very arrogant' Virat Kohli motivated me to knock India out of World T20: Lendl Simmons 7 June, 2016