Neil Harris, the Millwall manager, has warned Sheffield United they will not be able to drive a wedge between his team and its supporters during Saturday's match at The Den.
The Londoners, who host Chris Wilder's fourth placed side this weekend, are 22nd in the table after being beaten by West Bromwich Albion last weekend.
Despite acknowledging Millwall have produced "too many poor halves of football" since finishing eighth last term, Harris insisted they showed signs of progress in the Midlands and, much to his relief, the reaction of the travelling supporters proved they remain firmly behind his squad.
"I never take it for granted at our football club, how good they are," Harris said. "But they drove the team on, supported the team and appreciated at the end when everyone of them stayed.
"I hope they see enough in the group and I mean themselves, the board, the players that we have had a great three-and-a-half years. We are in a tricky spell and need everyone to stick together and I thought today they were outstanding."
Two managerial heroes:
Harris, who like Wilder played for his employers before entering the dug-out, guided Millwall to promotion via the League One play-offs in 2017.
United, who won the divisional title earlier that season, allowed Ryan Leonard to join their latest opponents on a 'loan to buy' deal before August's transfer deadline but the midfielder is unlikely to feature against his parent club.
Harris points to progress:
Although the defeat at The Hawthorns was Millwall's third in four outings, they did draw with leaders Leeds earlier this month.
"We can point to loads of things about not scoring enough goals, too many poor halves of football in my opinion over the course of the first nine games" Harris told the South London Press. "But we saw the positives (at West Brom) in individuals, the character of the team, the belief in the team to know that once we get that first little bit of luck or performance that gets us the win, then there is plenty more to come."