Groves picked Cox not just because he knows him because the British fans know him. It's an easy sell with Cox being with Matchroom, no problems with TV or anything.

Cox has sparred loads with Groves, Eubank jr and other top fighters through his barren spell (main sparring partner for Canelo recently). His problem is a) he's a luntatic and b) he's a lunatic (been inside a couple of times, should have been DQ'd a couple of times too). We had a Jamie Cox watch thread on here years ago before he went loco.