Fremantle captain Nat Fyfe is set to be a Docker for life after agreeing to a contract extension to remain at the AFL club until the end of the 2023 season.

The 2015 Brownlow Medallist’s six-year deal is the longest contract extension in the club’s history.

The deal will see 25-year-old Fyfe play at least three more seasons under coach Ross Lyon, who is contracted with Fremantle until the end of season 2020.