MK Dons will need to do what no other club has managed in nine games if they are to beat Millwall on Saturday - score a goal.
While Dons fans may be feeling more assured at the back these days, Millwall fans will feel relatively bulletproof, having conceded just once in their last 12 games, with nine clean sheets in a row heading into Saturday's clash.
HEAD TO HEAD: Millwall vs MK Dons
For Dons boss Robbie Neilson, it will be his first experience of The Den, but it's an atmosphere and environment he is looking forward to sampling.
"I'm really looking forward to it," he said. "I've heard a lot about The Den, I've heard about the atmosphere and intensity. I thought Bradford was really good too, with a big crowd in a huge stadium, it felt like a proper football match. It had an intensity.
"It will be really tough, breaking them down will be very hard. They've had nine clean sheets in a row, they don't open up a lot. They've been doing really well in the cups too, and it's a tough place to go at the best of times.
"But we're in decent form at the moment, we look pretty strong after a tough game in midweek and we go there with confidence to get three points."
It will be no mean feat to do that though. Neil Harris' side haven't lost this year, and have seen off two Premier League sides in that time too as their FA Cup campaign gathers pace. It's a run of form which has catapulted them to sixth in the table, while Dons' patchy form sees them sit 14th in the standings.
When the sides met back in August - sharing a 2-2 draw at Stadium MK as Kieran Agard bagged a brace on his debut - it was the first meeting in six-and-a-half years. But it is a match-up that has only seen Dons win once in their history, but it was a memorable 4-0 win at The Den.
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