On Wednesday evening, Arsenal manager Mikel Arteta confirmed the news that Gunners fans have been dreading. Namely, that Arsenal captain Martin Odegaard is set for a lengthy spell on the sidelines. The Gunners star suffered an ankle injury while on international duty with Norway earlier this month. Now, Arteta has told reporters at his pre-Atalanta press conference that Odegaard has sustained ligament damage. Mikel Arteta says Arsenal will be without Martin Odegaard ‘for a while’When asked by football.london how Odegaard was, Arteta replied: “After recent scans the scans showed that he’s got s…