Johnny Matthews grabbed a try and the Player-of-the-Match Award

Warriors were made to work hard for the win with Scarlets putting the hosts under pressure for much of the first half.

Scarlets took an early lead through a penalty from Ioan Lloyd and a try from Josh Macleod.

There was another blow for Warriors when Adam Hastings was forced off with a head knock to be replaced by Duncan Weir.

The Scotstoun men eventually put Scarlets under some sustained pressure and it was Johnny Matthews' close range try converted by Weir that put them back in the game just before the interval.

Scarlets made a strong start to the second half and increased their lead through an Ioan Nicholas try with Lloyd slotting the conversion.

Glasgow went over for their second try through Henco Venter in the 52nd minute with Weir converting to put them within striking distance.

Weir's reliable boot would feature yet again with a 68th minute penalty which ultimately sealed the game even though Scarlets had a chance to win it with a penalty of their own late on but Lloyd was not on target on this occasion.

Warriors will be delighted with the four-pointer, especially given the relatively inexperienced starting pack. Jack Mann, playing his second Glasgow match and Jare Oguntibeju impressed more and more as the game went on while Patrick Schickerling and Fin Richardson showed up well.

Glasgow hooker Johnny Matthews told Premier Sports: "That was a real battle. Fair play to the guys who stood up tonight.

"To get the win with an inexperienced squad just shows the depth we have.

"It shows how much trust and belief we have in the whole squad."

Glasgow Warriors head coach Franco Smith told BBC Scotland: "Everybody that follows us can be really proud. We used most of the boys who haven't played this season, young guys. We had four hookers involved and helped us get it done.

"We did well in taking them back five or six metres at the end through our defensive pressure, which made it a really tough goal [for Ioan Lloyd] into the wind. The compliment sits with the fact we didn't go offside and give a penalty away.

"The mentality of the players to not give up and wear their hearts on their sleeve. We said tonight would not determine our season, but the boys grabbed the opportunity. To get close to a full Scarlets team like that, that's playing well, they are very well coached, is a compliment to them.

"The first signs [when Adam Hastings] came off the pitch looked positive; we'll keep an eye on him."