The Chelsea striker infuriated Arsenal with his antics during the 2-0 win on Saturday that saw Gunners defender Gabriel sent off after clashing with the Spain international.
Zouma admitted Costa "cheats" to put his opponents off but insists Chelsea are proud to have him in the team.
He told beIN SPORTS: "Everyone knows Diego and this guy likes to cheat a lot and put the opponents out of his game, and that happened in the game
He's a real nice guy in the life and we are very proud to have him."
Source : PA
Source: PA