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.
Skipper Billy Twelvetrees admitted that the Gloucester squad were disappointed and frustrated after losing at home to Exeter, regretting that Gloucester's own errors had given the Chiefs the upper hand.
David Humphreys spoke to the local press after the Gloucester Rugby team to face Exeter Chiefs on Friday was announced. Henry Purdy is making his Premiership debut for Gloucester and thoroughly deserves his chance says Humphreys.
Dan Murphy was part of a Gloucester pack which took a grip as the Sale game progressed and, ultimately, were rewarded with a late penalty try. The loose head prop says the team's improved scrummaging is down to a lot of hard work over the summer.
Gloucester clinched their first Aviva Premiership win of the season on Saturday, 34-27 over Sale Sharks, and scrum half Greig Laidlaw felt that the Kingsholm crowd played a massive part as they spurred the team on.
David Humphreys spoke to Gloucester Rugby TV after the 34-27 win over Sale Sharks at Kingsholm. The Director of Rugby praised the Kingsholm crowd for spurring the team on to a super second half comeback.
Speaking to Gloucester Rugby TV this week, Sione Kalamafoni is expecting a tough, physical battle against Sale Sharks as the Cherry and Whites return to Kingsholm for Round Two of the Aviva Premiership