Gary Bowyer knows his Blackburn Rovers side will be in for a stern examination when they face Millwall this Tuesday evening.
Even though the Lions tasted defeat at the hands of league leaders Watford at the weekend, they've had some impressive results of late, with Bowyer anticipating another difficult game on their travels at the Den.
"We are going to a team that have just drawn with Derby County away," said the Rovers boss.
"There aren't many teams that have gone to Derby this year and taken points off them. Millwall not only drew with them, but they kept a clean sheet.
"They then went and beat Cardiff who have been on a terrific run. This league is incredible, anybody can beat anybody."
Bowyer is relishing visiting the Den once more and feels the experience of playing there can help his young side grow even further as a group.
"The Den is a great place to go," added Bowyer. "Ian Holloway did a fantastic job in keeping them up last year and I'm delighted that he did because it is great for our players to go and play in that environment.
"Our players will now they are in a game from the minute that they arrive there.
"I've watched Millwall and he's got them playing good football. I told our players straight after the Reading game that this is going to be the toughest test of the season for us and I still believe that.
"We've got to make sure that we are spot on and up to match anything that Millwall throw at us."
Rovers fans who haven't yet purchased tickets for the match against Millwall can do so from the Den this evening.
Tickets will go off sale Ewood Park at 11.30am. After that they'll be available from the North Stand Ticket office.