GLOUCESTER hooker Mefin Davies has been diagnosed with a damaged vein in his left calf following the injury he picked up against Saracens almost a fortnight ago.
The Welsh international hooker will be monitored over the next fortnight by Gloucester's medical team but there is no indication yet on a potential comeback date.
Davies has featured in six of Gloucester's seven Guinness Premiership games so far this season.
Head coach Dean Ryan said: "We recognise Mefin is an integral part of our squad but we have made it clear this season we are not prepared to rush players back from injury and he will have all the support required to recover fully.
"The timing is very unfortunate for Mefin but it will provide opportunities for other players within our squad to stake their claim for a starting spot."
Gloucester's win in Treviso last week means that they need a bonus point win against Bayonne on Saturday evening to secure a home quarter-final (kick off 8pm), but Tim Taylor wants the team to focus on the performance first and foremost.
Billy Burns and Man of the Match Richard Hibbard spoke to GRTV after the 41-0 win in Treviso, on a day when preparations weren't ideal. They felt the team's attitude was key and also praised the travelling support.
Matt Scott was again in impressive try scoring form for the Cherry and Whites on Saturday, and the Scotsman laid praise on his fellow backs for their attacking skills in a big 55-19 win over Worcester Warriors
Jonny May spilled blood for the cause on Saturday, before going on to score the first try in the 55-19 Aviva Premiership victory over Worcester. He told GRTV that the win was a reward for the hard work the squad have been putting in.
Knowing a bonus point win would secure a home quarter-final, Gloucester completed their European mission in some style on Saturday evening, sweeping aside a spirited but outgunned Aviron Bayonnais scoring 10 tries on their way to a 64-19 victory.
The Gloucester Rugby Heroes are back this month, and the huge array of past stars of Cherry and White, with a sprinkling of sporting legends and TV stars will assemble to take on the South African Legends on Sunday 29th January at Kingsholm.