West Ham United midfielder Jack Wilshere is facing six weeks on the sideline following ankle surgery.

Wilshere only joined the Hammers in the summer, after leaving Arsenal at the expiry of his contract.

The former England international was meant to elevate the side's midfield. However, his performances have been unimpressive since the start of the season.

And now he faces another injury layoff.

"Jack underwent successful surgery in London on Monday morning for a minor ongoing ankle issue," West Ham head of medical Richard Collinge said in a statement on the club's official website.

"The surgeon was happy with the procedure and all went as planned.

"We envisage he will only need a relatively short period of rest and will then start his rehabilitation. Jack is focused and determined to get back training and playing as soon as possible."