Nick Williams and Ruan Pienaar have been included in Ulster’s starting line-up for Friday’s Heineken Cup Pool 4 match against Glasgow Warriors at Scotstoun Stadium.

Stephen Ferris has failed to recover from a back injury so Iain Henderson retains his place at blindside flanker, as Mark Anscombe made just two changes to the starting team.

Williams has recovered from a rib injury picked up in the RaboDirect PRO12 win over Connacht a fortnight ago and will start the game at number 8 in place of Mike McComish who is named on the bench.

Pienaar scored the vital bonus-point winning try as a replacement last week against Castres and will start at scrumhalf.

Paul Marshall, who had ably deputised for the Springbok during the Rugby Championship, scored two tries in a man of the match display against the French side.

Coach Mark Anscombe has said it was a tough decision on the number 9 jersey: "Paul played outstanding last week and he showed what he is capable of with a man of the match performance.

"But we’re in the position where we have two fantastic options at scrumhalf. Ruan came on and showed what a quality player he is with his distribution and try and the end.

"We have to select the team to win specific games and that’s what we’ve done for this weekend. Rugby is an 80 minute game and it’s important to have someone like Paul, who can come on and make an impact.

"Nick Williams has trained all week and has proved that he is 100% fit. He’s looked sharp and it’s good to have him back in the team."

Full commentary on Glasgow v Ulster on Rugby Special on RTÉ Radio 1 Extra, LW 252 and from 19.30 on Friday 19 October.

Ulster team to play Glasgow Warriors in the Heineken Cup on Friday at the Scotstoun Stadium, kick-off 8pm: J Payne; T Bowe, D Cave, P Wallace, A Trimble; P Jackson, R Pienaar; T Court, R Best, J Afoa, J Muller (c), D Tuohy, I Henderson, C Henry, N Williams.

Replacements: R Herring, C Black, A Macklin, L Stevenson, M McComish, P Marshall, L Marshall, C Gilroy.