Gary Bowyer is expecting another tough test this Wednesday night when Rovers take on Derby County at Ewood Park.
After Derby's slow start to their league campaign, the Rams are now the form team of the Championship having won five of their last six league games.
The Rovers boss always thought that his former club would be up there this campaign after spending big in the summer, and feels they are starting to show their potential.
"Before the start of the season they were rightly favourites to win the league with the amount of investment made by the club," said Bowyer.
"They spent a lot of money but fair play to them they brought in a lot of quality. You look at their squad and you look at the players that can't get on their bench and that tells you the size of the task on Wednesday night.
"They are starting to hit the form now that showed why they were made the favourites."
For the second match in succession Bowyer is up against a former colleague as Paul Clement spent a brief spell as first team coach with Rovers.
The two have also crossed paths at youth level, so Bowyer is looking forward to renewing old acquaintances.
"He wasn't here for that long but I've known him for a long time because of his youth career," added Bowyer.
"He started off with Fulham and Chelsea and progressed through the sides there so I've known him a long time and still speak to him.
"He's had a wonderful education in working under Mr. Ancelotti and he has now taken that step to become the number one. I'm sure he's loving it, I'm sure he's learning loads of different things that he probably never encountered when he was at those illustrious clubs that he has worked at."
Tickets for this evening's match will be on sale right up until the 7.45pm kick-off.
Tickets are priced from £18 for Adults, £12 for Seniors 65 and over, £12 for 18-21 year-olds and just £7 for Juniors aged 17 and below.
Why not avoid the matchday queues by booking online at www.eticketing.co.uk/onerovers and collecting your tickets on the night at the Roverstore collection point.