Luis Suarez is part genius and part jerk, a player blessed with a rare quality to hurt his opponent and his own team. And now he’s back. The Liverpool striker has completed his 10-match ban for biting yes biting Chelsea’s Branislav Ivanovic last season and is expected to play at Old Trafford in the third round of the Capital One Cup against Manchester United on Wednesday. “He’s obviously not going to be 100%, when you come into these sorts of cup games and these games that are at a greater intensity,” says Liverpool manager Brendan Rogers. “But he’s a worker and he’s a fighter and his condition is good. He’s in a good place.” United will be a good test for both Liverpool and Suarez, who two years ago was suspended eight matches after the Football Association found him guilty of racially abusive language toward Manchester United defender Patrice Evra, who is black. Suarez’s antics, which include his habit of diving, have angered Liverpool enough that the club may try to sell him in January. But it’s a risky move because the Uruguay international is a proven scorer and his absence was apparent in Saturday’s 1-0 loss to Southampton at…