By John Cross Jurgen Klopp certainly did not celebrate like a manager who is not interested in the FA Cup. In fact, Klopp wheeled away in delight, fist pumped and the away end went wild after a third round tie which felt like a snap shot of the whole season. Arsenal started well, missed loads of chances – the whole world can see they need a centre forward – and allowed Liverpool to punish their wastefulness. It was hardly a classic for a bumper BBC live audience and the TV companies have got unlucky with their picks but at least we got a winner and Arsenal only have themselves to blame that i…