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.
Tom Marshall scored his first Gloucester try in the 31-23 win over Saracens on Friday evening and was named Man of the Match. Talking to GRTV, he praised the forwards for setting the tone on the night.
Matt Scott was on media duty this week, and the Scottish international spoke about the benefit of having a full week of training with his club mates and the determination to get back to performing well against Saracens this Friday evening.
After the disappointment of last weekend's performance at Leicester, Director of Rugby David Humphreys told GRTV that he expects a big response from Gloucester in Friday's Aviva Premiership fixture at home to Saracens (kick off 7:45pm).
Gloucester travel to Tigers this Saturday in good spirits, and fly half Billy Burns is looking forward to testing himself in one of the toughest environments in the league as the Cherry and White hunt vital points as attention returns to the Aviva Premiership
After a good run of recent results, Gloucester will travel to take on Leicester in a good frame of mind according to Director of Rugby David Humphreys, but are well aware of the challenge that lies in wait.
As part of its commitment to player welfare, The Rugby Players' Association (RPA) has today officially launched #LiftTheWeight, a new campaign that aims to help remove the stigma surrounding mental health issues and offer the necessary tools and support to enable our members to enjoy a healthy and fulfilling life, both on the field and off it.