Britain Football Soccer - Liverpool v Chelsea - Premier League - Anfield - 31/1/17 Liverpool manager Juergen Klopp Action Images via Reuters / Carl Recine Livepic
(Reuters) - Liverpool manager Juergen Klopp said Diego Costa is "not the nicest guy" on the pitch but praised him as an indispensable warrior for Premier League leaders Chelsea after the clubs drew 1-1 on Tuesday.
Klopp was left furious with referee Mark Clattenburg's decision not to award a free-kick for an apparent foul on Liverpool defender Dejan Lovren in the build-up to a late Chelsea penalty - which Costa missed.
