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Nathan Dyer spent the 2015-16 season on loan at Leicester City

Swansea City midfielder Nathan Dyer is to have ankle surgery and will be out for up to two months.

The 28-year-old, who won the Premier League title during a season-long loan at Leicester last season, has "extra bone growth" in the joint.

He said he is "bitterly disappointed", adding: "I started to feel some pain in my ankle after returning from the training camp in America.

Dyer signed a four-year contract extension with the Swans in August.

He added: "I saw a specialist last week and the MRI scan revealed the extra bone growth at the back of my ankle. There is not a lot I can do about it."