Against a Glovers side fighting for their Championship lives Rovers struggled to carve out any clear-cut opportunities, the best of them coming after just four minutes when Jason Lowe struck a post.
Rovers threw on forwards David Dunn and Josh King in the final half hour, but despite plenty of possession they couldn't fashion the one chance needed to win the game.
"If you look at all the lads in terms of the performances that they've produced over the season, then they've not reached those standards that they know they can," the manager told Radio Rovers.
"We looked a little bit nervy, we passed it off when somebody might have taken that opportunity to shoot.
"We said before the game that there would be no easy match, we knew Yeovil would come to try and nick a point and they've done it.
"They did that away at Leicester who have won the league, they drew last week with Bournemouth. There's no divine right to win any football match in this league.
"You always have to turn up and compete and I thought we did that, you have to be good at both ends of the pitch. We were good at our end of the pitch as I can't remember Robbo having to make a save. But at their end we haven't troubled their goalkeeper enough, it is simple.
"We haven't been cute enough in the final third today and that is it, we huffed and puffed.
"But we can't sulk, we can't feel sorry for ourselves. We'll regroup, we'll get the smiles back on the faces and we go again ready for Birmingham on Monday."
Ticket for the Birmingham match on Monday will be on sale from 10-4pm at Ewood Park on Saturday and then from St. Andrews on the day of the game, cash only from the turnstiles. Prices are £10.00 Adults, £5.00 Seniors, Students and 13-18 year olds, £1 Under 13s. Students must take ID.