As a former defender himself, manager Tony Mowbray was thrilled to see his side collect their third clean sheet of the season in Saturday's superb triumph over Brentford.
Following an opening day draw at Ipswich (2-2), Rovers have now picked up three shut-outs in their last four league games, having kept Millwall (0-0), Hull City (1-0) and the Bees (1-0) all at bay.
The manager believes his players are reaping the rewards of the work they are putting in at the training ground and gave special praise to his back four and goalkeeper.
"We do a lot of work on the fine detail of how high we need to be up the pitch and when we need to deepen off," said the Rovers boss.
"We're conscious of the assets and the physical attributes of our team.
"When you've got (Ryan) Nyambe, (Amari'i) Bell and (Darragh) Lenihan - super fast, super athletic - but then you add that to the quality and the left foot of (Charlie) Mulgrew, it's a powerful unit.
"Behind them you've got David Raya, who can spring like a jack in a box to his top corner, making some amazing saves, like he did a few times today.
"We're going to get tested as the season unfolds and it's not always going to be as happy as this.
"There's going to be character tests along the way, but I said to them today 'if you can beat Brentford then you shouldn't fear anyone in this league'.
"We should look forward to the challenges of each game, but we need to keep our team fit and fighting."