A report by Gazzetta dello Sport suggests Walker's tenure at the San Siro will be limited to just this season. The England international had been expected to make the switch to Italian side at the end of his six-month loan deal, as Milan have the option to buy the full-back for €5m.

After a promising start to life with the Rossinieri, Walker has struggled for form and fitness. Walker suffered a right elbow fracture during a recent training session, and following surgery, is expected to face a month to six weeks on the sidelines.

The injury could well mean Walker has played his final game for Milan, who now have 'doubts' over extending his stay at San Siro. The right-back has made 12 appearances for the club since joining in the January transfer window.