Calvin Howarth had a fine match from fly-half, claiming a try and three penalties, with Glasgow skipper Cameron Mather claiming their other try. The Warriors, who have done well in the League, were limited to three penalties from Neil Jenkins in the first-round match at the Brewery Field in Bridgend.

The sides were level 6-6 at the break but the Scots hit the Warriors with two quick tries and continued to turn over Welsh ball.

Glasgow had the upper hand in the early exchanges, but the Warriors stayed alert and organised in defence and the visitors were limited to a half-hearted drop-goal attempt from wing Gareth Maclure.

The Warriors looked dangerous on the counter, however, and their pacy backline had the edge over the Scots. Gareth Wyatt should have had a try after eight minutes, after fly-half Neil Jenkins released his backline and a sweet handling move allowed Matthew Nuthall to race upfield. But the Warriors full-back gave his pass to Wyatt far too early, failing to draw his opposite number Stuart Moffat who dragged down the Warriors wing.

The Welshman kept possession, however, and Glasgow inched offside to allow Jenkins to kick the Warriors' first points. The former Wales No 10 gave the Warriors a 6-0 lead with a second successful penalty after 25 minutes, but Howarth pulled a kick back for the visitors three minutes later, then drew the Scots level a minute before the break.

In between, Glasgow had almost stunned the home side after Sean Lamont intercepted a Jenkins pass on his own 22 and raced upfield, only for Aisea Havili to drag the wing down short of the Warriors line.

The visitors wasted another gilt-edged try opportunity in first-half injury time, when a fine forward effort seemed to take Glasgow over the line, only for referee Alan Lewis to rule the ball was held up. But the visitors made amends within a minute of the restart as the Warriors tackling failed for the first time allowing Lamont to break through.

Nuthall managed to drag down the 6ft 2in, 15st wing but Glasgow skipper Mather was on his shoulder to dive over. Howarth missed the conversion but scored Glasgow's second try six minutes later, finding Phil Booth in front of him and easily dancing around the Warriors prop to score. The fly-half also failed with his second conversion kick, but the Scots had still opened up a useful 16-6 lead.

The introduction of prop Chris Horsman, for Booth, and lock Deiniol Jones, for namesake Ryan, bolstered the Warriors pack, which had been second best for much of the match.

With some pressure at last being exerted on Glasgow, Jenkins managed to pull the Welsh back within a score with his third penalty, but Howarth soon struck back to restore the 10-point gap.

Glasgow were proving particularly tenacious at the tackle area, often ripping the ball out of a Warrior's grasp or stealing possession in some other manner to thwart the home side. Havili had one dart down the right wing with 10 minutes remaining, but again the Welsh support didn't materialise swiftly enough and the danger was snuffed out at the corner flag.

Report by BBC Rugby Union.