GLOUCESTER'S Wales number eight Gareth Delve will have surgery on July 9 to assess the damage to his Anterior Cruciate Ligament (ACL).
Delve will undergo his operation following consultation with specialist Andy Williams and will be out of action for a number of months and will miss the start of the season.
The 25-year-old suffered damage to his left knee during Wales' summer tour to South Africa and Gloucester's head coach Dean Ryan said: "Gareth is a tremendous individual and an outstanding player - someone we wanted to build around for the future.
"This injury is obviously a significant set-back to him and the club but I have no doubts he will be back in Gloucester colours next season. He has drive, determination and a willingness to succeed and I am sure that will come through in his recovery."
Delve made 20 appearances in all competitions for Gloucester last season following his summer move from Bath.
Meanwhile, flanker Akapusi Qera will see a specialist in London on Monday to determine the extent of his knee injury.
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.
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.