STRIKER John Marquis says Millwall are determined to get their own back on Barnsley after the Tykes' smash-and-grab win at The Den in December.
Marquis is keen to ensure the Lions do not lose focus on their Championship campaign in the wake of their FA Cup triumph over Aston Villa last week.
And the 20-year-old, who scored a dramatic late winner against Villa, says Kenny Jackett's side travel to Oakwell on Tuesday with revenge on their mind following Barnsley's last-gasp victory in SE16.
"Barnsley beat us at home which, in my opinion, they didn't deserve to do," he said. "They got a bit lucky that day so we will want to get one over them.
"We want to get our form back in the league so we are a force again home and away. That starts on Tuesday. It's going to be a cold night up north but we're going to bring the same attitude with us."
Captain Danny Shittu stressed the importance of staying grounded in the aftermath of Millwall's 2-1 win over Paul Lambert's side on Friday night.
"We are not going to get carried away," he added. "We know that we can still fight to get promoted or end up in the play-offs.
"We've still got our feet on the ground. These games are very important. We are delighted after Villa but we want to win on Tuesday. That's really important."