Royal Challengers Bengaluru captain Faf du Plessis admitted his side were "a little bit" short when setting the score in their Indian Premier League playoff defeat to Rajasthan Royals on Wednesday.

RCB batted first but failed to capitalise on strong starts from Virat Kohli (33), Rajat Patidar (34) and Mahipal Lomror (32) as they finished on 172-8.

The Royals won with an over remaining, despite slipping to 160-6 in the 18th, as Rovman Powell got them over the line with an unbeaten 16.

"I think with the dew coming in the second innings, we thought we were a little bit short with the bat," Du Plessis said after the match on the official broadcast.

"It felt like we needed a push, a few more runs to make it even more competitive. So, I did think we were 20 runs shy of a good score on that pitch. But credit to our boys who fought really well, hanging in there right till the end. That's all you can ask for, a great fight.

"Batting first, it can be tough because the ball is sticking into the surface. You're thinking 190. But if you lose a couple of wickets, then the problem starts.

"What we found out this season is with obviously the extra batter and the longer batting line-ups because of the super sub [Impact Player], your par scores are really not what they used to be, especially if there's dew. So, we knew we needed a little bit more in terms of a score to challenge them."

RCB were the in-form team heading into the playoffs, having won each of their last six games to turn their season around, but they could not make it past the eliminator.

Despite falling at the first post-season hurdle, Du Plessis was still proud of the team’s achievements.

"A lot of teams would have probably fallen off after one [win] from nine [eight]," he added.

"We have got great characters in that dressing room, all of us really put our hands up with a lot of pride and a lot of fight in us to make sure we give our best and give absolutely everything we have. And to come back like that, winning six games in a row takes a lot of heart, takes a lot of character.

"So, it's a sad ending when it goes your way like that, you feel like is it possibly written in the stars that you could do something special here, but we weren't special tonight in terms of just pushing that extra 20 runs with the bat."