FREMANTLE'S task of winning its first match of the year has become that much tougher, with skipper David Mundy a late withdrawal from Saturday night's derby against West Coast due to a calf complaint.

The Dockers captain has been replaced in the side's 22 by Tendai Mzungu, who was dropped following Fremantle's 65-point loss to the Western Bulldogs in round one.

Mundy has averaged 21 disposals and five clearances in the first two games of 2016.

He did have a slightly interrupted summer due to some groin soreness. Mundy missed the Dockers' first two NAB Challenge matches before playing against Geelong in the final pre-season game.

Mundy trained without any issues at the Dockers' open session on Tuesday at Fremantle Oval ahead of the derby but was withdrawn from the selected side on Friday.

Mzungu collected 25 disposals to go with six tackles for Peel Thunder in last week's WAFL match up against Swan Districts.

Matt De Boer was included in the side on Thursday night at the expense of Clancee Pearce (hamstring), and youngster Darcy Tucker has been added to the emergency list.

Tucker was the Dockers' second round pick in last year's NAB AFL draft and performed well in their first NAB Challenge match against Richmond, but a knee injury prevented him from playing again in the pre-season.

He performed well in the WAFL last week collecting 22 disposals and kicking two goals.