Henry Paul will miss the remainder of the season after Gloucester's medical team confirmed he has damaged the medial ligament in his knee.
The England international injured his knee playing for England Sevens at the World Cup in Hong Kong 10 days ago and was ruled out of last Saturday's win over London Irish.
Paul is set to be out for between six and eight weeks and will be unavailable for Gloucester's final three Zurich Premiership games, and any play-off matches.
Commenting on www.gloucesterrugbyclub.com Melville said: "It's a set-back but in some ways sums up our season. We have just had so many people injured at crucial periods, but you only have to look around the Premiership to see that other clubs are in a similar situation."
Commenting on www.gloucesterrugbyclub.com Paul added: "It's a big disappointment. I'm concentrating on getting back to full fitness, and will be right behind the rest of the team as we push for the top three slot in the Premiership and next season's Heineken Cup."
Paul, who has missed only a handful of games in four seasons with Gloucester, will see a specialist next week who will assess whether an operation is required.
Despite the injury, Nigel Melville's fly-half options could be boosted for Gloucester's next Premiership game at home to Leeds Tykes on Saturday 9 April with the return of Duncan McRae.
The Aussie stand-off has had an injury hit season, with his most recent knee injury ruling him out since the defeat away at Quins at the beginning of February.
As well as McRae's possible return, 22 year-old Brad Davies, who played the full 80 minutes at number 10 for Gloucester in the 13-12 win over London Irish on Saturday, was in commanding form for Gloucester against the Exiles at the weekend.
Jonny May's superb late score capped a thrilling 40-32 European play-off win over Connacht on Sunday. The winger spoke afterwards of his team's character and spirit as he looked ahead to one more week of rugby.
Speaking to GRTV this afternoon, Director of Rugby David Humphreys hailed the 'never say die' attitude of the team, after despite not being at their best, fighting back to take a 40-32 win after extra time over Connacht.
Jonny May continues on the wing on Sunday as Connacht come to town, and the England wing explains to the local media this week that he is delighted with his form and is looking forward to taking on Pat Lam's men.
Speaking to the local media this week, front rower John Afoa is familiar with the challenge of Connacht from his time in Belfast, and the World Cup winner is fully aware of the challenge they pose ahead of Sunday's meeting in the Champions Cup play off
Speaking ahead of Gloucester's European Rugby Champions play-off against Connacht on Sunday (Kingsholm, 3:30pm), Director of Rugby David Humphreys admitted that he's glad to have more players available than in recent weeks ahead of a tough fixture.
Nick Wood captained the Cherry and Whites on Saturday afternoon, and the experienced front rower expressed his pride in the young squad in defeat to Bath on the final day of the Aviva Premiership season.
Lewis Ludlow scored Gloucester's opening try in the 30-50 defeat at Bath on Saturday, part of an impressive performance by the young back row forward. Speaking after the game, he paid tribute to the young Gloucester side who went toe to toe with the Aviva Premiership semi-finalists.
Speaking to the local media after the game, Director of Rugby David Humphreys gave an honest assessment of the game, and expressed his pride in the way his young charges had performed against the title-chasing hosts.
Speaking to the local media this week, Gloucester Rugby scrum half Callum Braley is excited by the challenge of the West Country Derby, and the ex-Bristol man reveals the squad will be giving their all.
Gloucester Rugby is delighted to confirm that 18 year old Mat Protheroe, a product of Hartpury College and one of the brightest young talents in the English game, has signed a senior contract at Kingsholm.
At the recent London Irish game, personnel from the Imjin Barracks in Innsworth, including Gurkhas, were present, holding a collection to raise funds for ShelterBox to aid relief from the recent Nepal Earthquake Appeal.