Brandon Thomson scored 16 of Glasgow's points

Once again, mistakes proved costly for Warriors as Scarlets opened up a 25-9 second-half lead with three tries in eight minutes after a scrappy first period saw the teams go in level at the interval.

Tries from Brandon Thomson and Stafford McDowall put Warriors in with a shout of the win but Scarlets, who finished the game with 14 men after Josh McLeod was sin-binned, held out on their line and forced another Glasgow error to leave the Scotstoun men with a single losing bonus point.

A nervy first half saw the teams tied with two penalties each - Thomson for the home side while the visitors' Dan Jones was successful in two of three attempts.

Scarlets should have been ahead but winger Tom James, dropped the ball just a yard from the line.

After the match Glasgow Head Coach Dave Rennie talked about his frustration at the manner of the loss.

"Conceding three tries in such quick succession, all from situations where we made errors, really hurt us," said Rennie to glasgowwarriors.org.

"It's incredibly disappointing.

"I'm rapt with the character the boys showed at the end there - at 25-9 we looked dead. We got ourselves in a position where we could and maybe should have won it, which was pleasing, but we made too many errors."

The Glasgow boss also highlighted errors made at key times.

"I felt we carried well and got in behind them in the first half, and then we’d make an error," said Rennie.

"We got points when they were on offer and exited well, but we've still got to communicate better and make better decisions.

"It's frustrating, because we handed it to them in that eight-minute spell."

Rennie and his coaching staff say they won't be pressing the panic button after the disappointing opening to the campaign, instead focusing on next week's meeting with Cardiff Blues at Scotstoun.

"We always knew it would be a tough draw to start," said Rennie.

"Cheetahs away, when they've just come off the Currie Cup and are well oiled, was always going to be tough, but we were poor last week. I thought we were better this week, and we showed a lot of fight.

"We want to win though, and we'll keep working hard. We'll sit down and watch the Edinburgh take on Cardiff tomorrow and start building towards next weekend.

"This competition is 21 rounds long, though, so there's no panic from us."