Van der Merwe soars high and gathers

Pienaar to touch

Penalty accrued by Ulster at the following breakdown

Glasgow resort to the boot off the scrum, and Olding looks to run it

We return for the inital knock one

Spilled forward by O'Connor, Nakarawa looks to play it, but knocks forward

Ulster on the attack inside Warrior's territory

We're off!

Ulster hit the top of the PRO12 table following their victory in the rearranged round 12 game against Dragons this evening – the first time they have led the league table since May 2013. The Ulstermen's only defeat in their last five PRO12 fixtures was 7-9 to Munster in Belfast on 2 January. Glasgow Warriors have won just one of their last six matches in all tournaments: 22-5 over Racing 92 in Kilmarnock on 23 January.

Sam Windsor will make his competitive debut for Ulster after being selected at outhalf by Director of Rugby, Les Kiss. The 28-year-old replaces Ian Humphreys, who suffered a concussion in the 17-15 win over Newport Gwent Dragons last weekend.