Callum Gibbins scored a double for Warriors

Warriors had already secured their home PRO14 semi-final but were looking for some momentum ahead of next weekend's 1872 Cup decider while Ulster needed a bonus-point win to keep their season going.

After trailing early in the first half, Warriors evened things up at 10-10 with a try by Callum Gibbins and a conversion and penalty from Finn Russell.

Glasgow found some rhythm and looked to have added another score but the TMO decided Alex Dunbar was short of the tryline.

More sloppy play from Glasgow saw Ulster add two late penalties to go ahead at the break.

Callum Gibbins scored a second off the back of a driving maul at the start of the second half and Warriors looked as if they were going to kick on.

However, mistakes were punctuating Glasgow's play and led to two scores in the space of five minutes from Ulster stretching the lead and encouraging hopes of the vital bonus point.

With the clock at red and after multiple phases, Ulster went in at the corner to secure the five points and leaving the Warriors regretting their poor decision making and errors.

After the match, Dave Rennie said: "Obviously we're disappointed to lose. They were more urgent and desperate than us and we didn't have the answers in the second half.

"We had our chances. It was a pretty slow start but we got it back to ten all and then thought we'd scored and had pretty good momentum.

"There were a number of times tonight that we were one pass away from cracking them we just needed to get the ball out of our hands.

"We're frustrated but in the end they had the edge on us and out muscled us and were pretty clinical in the second half."

Focus now switches to next weekend and the 1872 Cup meeting with Edinburgh at Murrayfield.

Rennie said: "We've got a lot to play for next week. We'll reflect, take a look at the footage and we'll make our minds up about who is going to play in that game.

"There are some pretty disappointed boys in the changing room so we're going to have to pick them back up and front up next week.

"Changes will be made ahead of Edinburgh. We've got a handful of guys who didn't travel who will come into the mix. We'll know more after we review the game properly."