Luke Narraway has lost his battle to feature for Gloucester at Saracens tomorrow – but 19-year-old scrum-half Dave Lewis will make his first senior start for the club.

The Academy youngster made a significant impact from the bench as Gloucester won 11-10 at Newcastle in the EDF Energy Cup two weekends ago.

And he will partner Ryan Lamb at half-back when Gloucester, seventh in the Guinness Premiership, head to Vicarage Road.

"I've been really enjoying my time with the first team and I'm quite happy to be getting some opportunities – hopefully it will last a bit longer," said Lewis.

"I knew I was moving up the pecking order when Mike Prendergast left in the summer, but I also understood that Gareth Cooper and Rory Lawson are both internationals, so if they are playing well then my chances were going to be limited.

"I was always looking forward to this period, and hopefully I will keep getting opportunities."

Lewis has capitalised on the uncertainty over Cooper's involvement in tomorrow's game, with Wales only confirming late in the week that he could turn out for his club after being omitted from the 22 who faced Canada in Cardiff last night.

But he has also put himself firmly in the frame for prolonged involvement in the Gloucester first-team after his fearless cameo at Kingston Park 13 days ago.

"You maybe only get one chance, so I have just looked to take my opportunities when they have come," said Lewis.

"I really wanted to enjoy it, which I have done, and use it as a really good experience.

"I was more relieved to get the win than anything else at Newcastle, but then it was quite nice to see what Dean Ryan said about me – that kind of thing gives you a bit more confidence."

Lewis' elevation from the bench is one of seven changes to the side that struggled to victory over Newcastle, with Olly Morgan, Anthony Allen, Olivier Azam, Jack Forster, Will James and Apo Satala also coming into the team.

Alasdair Strokosch has been cleared to play by Scotland and he starts at No 8, with youngster Dan Williams providing cover.

Saracens: A Goode; K Sorrell, A Powell, A Farrell (capt), N Cato; G Jackson, N de Kock; N Lloyd, M Cairns, C Visagie, K Chesney, H Vyvyan, B Skirving, A Saull, M Owen. Reps: A Kyriacou, T Mercey, T Ryder, W van Heerden, M Wilson, B Barritt, E Thrower.

Gloucester: O Morgan; I Balshaw, M Tindall (capt), A Allen, L Vainikolo; R Lamb, D Lewis; N Wood, O Azam, J Forster, W James, A Brown, P Buxton, A Satala, A Strokosch. Reps: D Young, S Lawson, A Eustace, D Williams, G Cooper, O Barkley, M Watkins.