By Simon Mullock Liverpool keeper Caoimhin Kelleher insists he has no fears about going back into the Old Trafford madhouse. Kelleher, 25, has been outstanding for the table-topping Reds in the absence of injured No 1 Alisson Becker this season and will once again be Jurgen Klopp ’s last line of defence when Liverpool face old foes Manchester United. His first appearance at Old Trafford saw him concede four times as United knocked their biggest rivals out of the FA Cup last month. But the Irishman’s unflustered temperament was a big factor in why Klopp refused to countenance his departure fr…