Glasgow head coach Gregor Townsend has called on his players to sustain their peak level of performance over 80 minutes when they host Ulster in the Heineken Cup on Friday night.
Glasgow were 15-0 up at Northampton in their first group game before falling to a 24-15 defeat, although they were not helped by injuries to Ruaridh Jackson, Stuart Hogg and Sean Lamont. But only Lamont misses out against last season's runners-up and Townsend is pushing his side to make a lasting impression on the game.
"We were pleased with how we performed in the first 30 minutes at Northampton, but are well aware that against the calibre of opponents we play in this competition, we need to be at the top of our game for the full 80," he said.
He added: "Our 18-10 defeat to Ulster on the first night of the RaboDirect Pro12 season was quite similar to the Northampton game, in that we did a lot of things very well but didn't quite sustain it over the piece.
"As their results show, Ulster have improved since then, but we have as well. We go into the game with confidence, pushing to secure the win for what's shaping up to be a big home crowd."
Lamont, who has a facial injury, misses out along with fellow winger Tommy Seymour, who was handed a one-week suspension for a tip tackle.
Byron McGuigan and Alex Dunbar start on the wings with Peter Murchie at outside centre.
Tom Ryder and Chris Fusaro come in up front while Rob Harley returns from a knee injury.