Mikel Arteta’s £20m Arsenal transfer decision questioned after Europa League win

Arsenal legend Martin Keown has questioned Mikel Arteta’s decision to allow Emiliano Martinez to leave the club during the summer.

Martinez joined Aston Villa on a £20million deal having impressed in Bernd Leno’s absence in the back end of last season.

The Argentinian was set to revert to being the Gunners number two and was keen to get more regular football having been a loyal servant to the club.

But Arsenal’s willingness to let him go has been called into question by Keown following a shaky performance from starting keeper Leno on Thursday night.

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Leno made a big error which led to Rapid Wien’s goal in the Gunners’ 2-1 Europa League group stage win, the German’s teammates bailing him out with a comeback.

The 28-year-old almost gave away a second goal, too, caught off his line in the first-half, but he was helped by his teammates in the second instance.

“Having let Martinez go – who was magnificent – and seeing Leno make these types of mistakes, you wonder whether they’ve made the right call,” Keown said on BT Sport.

Arsenal did replace Martinez, signing Alex Runarsson from Dijon, but the Icelandic, like his predecessor, will likely have to be patient to…