Tony Mowbray hailed his side's hard-working performance, as Rovers recorded an impressive 3-0 victory over Everton at Ewood Park.
Goals from Darragh Lenihan, Dominic Samuel and Bradley Dack saw Rovers stun their Premier League opponents, who introduced new £50m signing Richarlison in the second half.
Mowbray was particularly pleased with the way his players put into practice the principles of play they have been working on at the club's Brockhall training base throughout the close season, with the big kick-off against Ipswich Town now just nine days away.
"I thought they worked really hard," said the Rovers boss. "I thought they took on board all of the stuff we've worked really, really hard on over the course of pre-season.
"We played against a Premier League side and coped okay tonight.
"They still had some good opportunities and got into some good areas, particularly in the second half, but from our point of view, we worked really hard and put into practice the principles that we work on every day.
"They're all buying into it, the signs are good at this moment and yet we should never get fooled by a pre-season performance or result.
"Goals and clean sheets is a winning formula.
"As I said, we work to a set of principles in every game.
"We can't dictate how the opposition are going to play. We have to concentrate on ourselves and try to overcome the opposition.
"Tonight we did well and got a positive result. They created some good chances in the second half, but we showed some good resilience and there were a lot of good individual performances I felt tonight."