MILLWALL will play Nottingham Forest in a behind-closed-doors friendly on Tuesday.
The Lions have been fine-tuning their preparations for the 206-17 season in Portugal after flying to a training camp in the country last Thursday.
Boss Neil Harris will likely use the fixture to give a run-out to a number of players, including new signings Shaun Hutchinson, David Worrall, Gregg Wylde and Paul Rooney.
The squad is due back in London on Wednesday before the first public pre-season friendly against Bromley this Saturday.
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