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.
Gareth Evans was a first half replacement for the Cherry and Whites on Saturday afternoon, but the back rower's impressive carrying kept the hosts on the front foot when they needed it most to snatch a dramatic comeback win.
After his last ditch try clinched the 42-40 Aviva Premiership victory over Newcastle at Kingsholm on Saturday, Billy Burns told GRTV that all the Gloucester team deserve credit for hanging in there against a Falcons team who really made life tough for the Cherry and Whites.
Speaking ahead of Saturday's Aviva Premiership fixture at home to Newcastle Falcons (kick off 3pm), Director of Rugby David Humphreys emphasised the importance this weekend of Gloucester building on last week's impressive home victory against the Exeter Chiefs.
Speaking to the assembled national and local media, try-scorer Jonny May was delighted and relieved to have tasted victory on Saturday evening, and is looking forward to the European Rugby Challenge Cup final.
Tom Savage delivered a Man of the Match performance against Exeter Chiefs on his birthday on Saturday evening. He spoke to GRTV after the game about the importance of the European Rugby Challenge Cup win.
Speaking to the local media this week, John Afoa described the hard work that the Cherry and White have been putting in and that he is fighting fit ready for Saturday's European Rugby Challenge Cup semi final clash with Exeter Chiefs.
An independent disciplinary hearing today found that Mariano Galarza was selected for the Aviva Premiership match against Sale Sharks on March 29th, when he did not hold effective registration for Gloucester Rugby. The club was fined £5000 and received a two point deduction, suspended for two years.