Doncaster Rovers lost 3-1 to Huddersfield Town in Tuesday’s behind-closed-doors friendly.
Richie Wellens put Rovers ahead with a first half volley.
But Town’s James Vaughan struck a second half hat trick to earn victory for the Terriers.
Rovers are based in the Algarve until Friday.
Their next friendly is at Grimsby Town next Tuesday (7pm).