Mikel Arteta's second-placed side moved within four points of Liverpool thanks to their stirring fightback in Wednesday's 2-1 win against arch rivals Tottenham.
The teams were locked at 1-1 on aggregate after an absorbing second leg at the Emirates but Raya saved twice in the shootout to break the hearts of the two-time champions.
Mikel Arteta's second-placed side moved within four points of Liverpool thanks to their stirring fightback in Wednesday's 2-1 win against arch rivals Tottenham.
The teams were locked at 1-1 on aggregate after an absorbing second leg at the Emirates but Raya saved twice in the shootout to break the hearts of the two-time champions.
