JOHN BARCLAY denied he was motivated by revenge but his man-of-the-match display certainly left Scotstoun cold.

The ex-Scotland flanker was told the previous Sunday he had not made the cut for the World Cup and his response was to travel north with his Welsh club and ruin the curtain-raiser for Glasgow Warriors' PRO12 title defence.

While satisfied to have played the role of killjoy he insisted he was only carrying out his professional duties against a team containing Josh Strauss, Scotland's uncapped import who Vern Cotter included in his 31.

"I did not really associate it with the World Cup, to be honest, we are playing in a totally different competition," said Barclay.

"Wayne [Pivac, the Scarlets head coach] asked me 'do you want to play?' and I really wanted to I just wanted to play rugby.

"I had a long pre-season, I was gutted on Sunday, obviously, but you have to get back into it.

"I am lucky to play in a team where I get on really well with the coach, get on really well with the boys and coming back have really enjoyed it.

"There is not a lot you can say. He can't really say anything either; he can tell you why but there is no point in arguing, he has made his mind up.

"We knew that was the deal from the start, 46 into 31 does not go so I knew I was up against it but you are still gutted when it happens."

Warriors may be champions but this 16-10 defeat will have been a real wake-up call for Gregor Townsend.

Barclay's fellow flanker Aaron Shingler put the Scarlets ahead and wing Hadleigh Parkes doubled the lead with a second touchdown in the first half with Dan Jones, the fly half, adding two penalties but also missing three shots at goal.

Glasgow battled back with Mike Cusack scoring shortly after half time but it took another 35 minutes and two yellow cards for the Scarlets before Glenn Bryce went over in the dying seconds.