Nick Grigg was man-of-the-match after a fine display

Tries from Sean Lamont (2), Fraser Brown and Leonardo Sarto with Rory Clegg adding three penalties and two conversions gave Warriors the win.

Zebre's hard work was rewarded with a last minute penalty that secured a deserved losing bonus-point. With Robert Harley in the sin-bin, Zebre could easily have snatched the game right at the end, but Warriors held on for the win.

Despite the nervous closing minutes, Warriors will be happy with their weekend's work with Matt Fagerson and Robert McAlpine making their first starts and Callum Hunter-Hill coming off the bench for his debut in a Glasgow shirt.

Leonardo Sarto came off the bench to grab his first try for Glasgow while Nick Grigg played some excellent running rugby throughout the afternoon.

With four Scotland centres - Alex Dunbar, Mark Bennett, Peter Horne and Richie Vernon - on the injured list, the New Zealand-born midfielder took full advantage and had a hand in three of Glasgow's four tries.

Sean Lamont opened the scoring from close range after Lee Jones was held up, and two Rory Clegg penalties gave a Glasgow an 11-6 lead before Fabiani's try levelled the scores.

Nick Grigg's running was punching holes in the Zebre defence and Glasgow went close when the 24-year-old offloaded to Leonardo Sarto, who was tackled just short.

Just before the interval Grigg picked the ball up on the Warriors' 22 and beat several defenders on a 90m run before the ball went wide for Fraser Brown to go over for the second try.

Grigg darted through another gap before offloading to Sean Lamont for his second early in the second half, and then released Sarto for a score against his old club.

Flanker Matt Fagerson - a late call-up to the starting XV after Corey Flynn was ruled out and Fraser Brown reverted to hooker - was earlier sin-binned for a dust-up with Zebre's Johan Meyer, who also saw yellow for the same incident after 32 minutes.

Glasgow took full advantage of Giulio Bisegni's yellow card early on the resumption, scoring two tries in his absence.

But a second Glasgow sin-bin for Robert Harley, when the lock was penalised for pulling down a maul 14 minutes from time, saw the visitors concede a third try and forced to defend manfully in his absence, before eventually seeing the game out.