Mikel Arteta took responsibility for Arsenal’s meek FA Cup quarter-final exit at Southampton as the Premier League leaders blew a glorious chance to return to Wembley.A fortnight on from the disappointing Carabao Cup final loss to Manchester City, the absentee-hit Gunners lost to Sky Bet Championship opposition at a rocking St Mary’s on Saturday evening.Ross Stewart fired in-form Saints ahead at the end of a move featuring Martin Odegaard and Ben White errors, with Leo Scienza hitting the crossbar before substitute Viktor Gyokeres equalised for Arsenal.
