Glasgow Warriors beat Ospreys 28-10 at Liberty Stadium on Friday to condemn the defending PRO12 champions to their third defeat in as many games.
Ospreys are still waiting on their first win of the season while Warriors open their account.
Good early pressure on the visitor's line was all for nothing, as Glasgow winger DTH van der Merwe took advantage of a cross-kick to charge 90 metres while evading Dan Biggar's chase to dot down after only three minutes.
In what could only be put down to a bad day at the office in the Liberty Stadium, the first half was ended with a 0-15 deficit, as Chris Fusaro added a second try on the half hour after taking advantage of indecision by Rhys Webb at the back of his scrum. Dan Weir converted, adding to his 13th minute penalty goal for what was to be an unassailable lead.
Chris Cusiter became an early casualty, but his side maintained their early momentum, as Henry Pyrgos stood in well for the injury-prone scrum-half. The Ospreys started the second period on the font foot, but that was undone by the sin-binning of scrum-half Webb for obstruction only five minutes in.
Both sides were down to fourteen men as James Eddie went for ten minutes after pulling down a driving maul, before Ian Evans finally put points on the board for the Ospreys as he drove over the line.
Although Dan Biggar converted, three minutes later, Canadian international van der Merwe got his second after spinning out a tackle to score for a 25-7 lead on 54 minutes after Weir added the extras.
The final quarter failed to see any further tries, and with Biggar and Ruaridh Jackson swapping penalty goals, the Warriors finally got their season underway.
Tries: van der Merwe 2, Fusaro
Cons: Weir 2
Pens: Weir 2, Jackson
Yellow cards: Webb (Ospreys -45th min); Eddie (Glasgow - 50th min)
Ospreys: 15 Richard Fussell, 14 Hanno Dirksen, 13 Jonathan Spratt, 12 Ashley Beck, 11 Tom Grabham, 10 Dan Biggar, 9 Rhys Webb, 8 Joe Bearman, 7 Justin Tipuric (c), 6 George Stowers, 5 Ian Evans, 4 Ian Gough, 3 Aaron Jarvis, 2 Richard Hibbard, 1 Duncan Jones.
Replacements: 16 Scott Baldwin, 17 Ryan Bevington, 18 Joe Rees, 19 Alun Wyn Jones, 20 Sam Lewis, 21 Kahn Fotuali'i, 22 Matthew Morgan, 23 Andrew Bishop.
Glasgow Warriors:15 Peter Murchie, 14 Tommy Seymour, 13 Alex Dunbar, 12 Peter Horne, 11 DTH van der Merwe, 10 Duncan Weir, 9 Chris Cusiter, 8 Ryan Wilson, 7 Chris Fusaro, 6 John Barclay, 5 Al Kellock (c)), 4 Tom Ryder, 3 Mike Cusack, 2 Dougie Hall, 1 Ryan Grant.
Replacements: 16 Finlay Gillies, 17 George Hunter 18 Gordon Reid, 19 James Eddie, 20 Angus Macdonald, 21 Henry Pyrgos, 22 Ruaridh Jackson, 23 Sean Lamont.
Venue: Liberty Stadium
Referee: Leo Colgan (IRFU