Mikel Arteta admitted Arsenal need a psychological “reset” after they could not capitalise on chances in their 2-0 FA Cup third-round loss to Liverpool at the Emirates.The Gunners dominated the first half but Jakub Kiwior conceded an own goal after 80 minutes before Luis Diaz’s neat finish in second half added-time was enough for Jurgen Klopp’s men to claim victory.Arteta’s side now have just one win in seven matches across all competitions and the boss agreed his side risk falling into a mental slump after failing to find the finishing touch.