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Millwall midfielder Liam Trotter is set to miss the start of the season after undergoing surgery on a knee injury.

The 24-year-old, who scored six goals in 42 appearances for the Lions last season, had an operation on Wednesday.

A club statement said Trotter will "begin his rehabilitation with a view to returning to full training in the early part of the season".

Meanwhile Millwall have completed the signing of winger Lee Martin following the completion of a medical.

The 26-year-old former Ipswich Town player has signed a one-year deal with the south London club.