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.
Speaking after the game, Charlie Sharples described it as 'the win that has eluded us.' The winger stressed that Gloucester had stayed positive after the first couple of weeks of the Aviva Premiership season and the 26-13 victory over Sale was a result of that focus.
Gloucester Rugby picked up their first win of the new Aviva Premiership season on Friday night, easing to a 26-13 win on the road at Sale Sharks. Director of Rugby David Humphreys was full of praise for his players on the night.
Defence Coach Jonny Bell was on media duties ahead of the Aviva Premiership fixture at Sale Sharks on Friday evening, and spoke about where Gloucester find themselves in terms of their form at the moment as well as how he's viewing their defensive displays so far.
Callum Braley, who skippered Gloucester United to a 22-19 Aviva Premiership A League win over Saracens Storm on Monday evening, paid tribute to his forwards and the younger players in what he described as not the prettiest of wins.
A desperately disappointing afternoon for Gloucester who, despite dominating possession and territory, were guilty of failing to make the most of it against a resolute Newcastle defence before the visitors pounced to snatch the win in the second half.
Mariano Galarza and Ross Moriarty are both back from injury as Gloucester entertain the Newcastle Falcons at Kingsholm in the Aviva Premiership (Saturday, kick off 3pm). Willi Heinz will skipper the side from scrum-half.