By Katie Catherall Mikel Arteta has blamed Arsenal’s lack of “spark” as they bowed out of the Champions League following a second leg quarter-final defeat at the hands of Bayern Munich. The Gunners miss out on a chance to earn European success as Bayern secure their place in the semi-final with a 1-0 victory courtesy of Joshua Kimmich’s headed winner. Arteta’s side headed to Germany with everything to play for after drawing in the first leg, but were unable to capitalise on the lessons they had learned from playing Bayern at the Emirates. The boss went on to admit Arsenal’s squad were devastat…