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.
Speaking to GRTV after the 33-19 win over Glasgow Warriors on Friday night, Laurie Fisher was delighted to get the win and a stern defensive examination in the final run out before the start of the new domestic season.
Speaking at the launch of the Aviva Premiership at Twickenham on Thursday, Gloucester Rugby skipper Greig Laidlaw spoke about the team's preparations and how they're all eagerly awaiting the big kick-off against Leicester.
Matt Scott made his first appearance in Cherry and White on Saturday afternoon, and despite a narrow loss to Leinster, the Scotsman highlighted a lot to be pleased about after the first hit out of the new season.
Lloyd Evans will assume a senior role in the Gloucester Rugby squad as they head to Franklin's Gardens for the Singha Premiership Rugby 7s on Friday evening. The exciting Academy fly half spoke to GRTV this week ahead of the season curtain-raiser.
Summer signing Matt Scott met with the local media for the first time this week and said that he's settling in well at Gloucester, that hopes are high for the forthcoming season and that skipper Greig Laidlaw had done a good sales pitch when it came to him signing!
Olly Morgan is heading up Gloucester's Singha Premiership 7s once again this summer and, with the start of the tournament just around the corner, he's looking for some of the club's younger players to make the most of the playing time and the exposure it offers.
The Cherry & Whites are now in their second full week of preseason ahead of the new season, and GRTV caught up with the new Head of Strength & Conditioning Dan Tobin to chat about what is in store, and his first impressions of the club.
If Gloucester were looking for a defensive workout, they certainly got it in the first half. But they cut loose in the second to run out winners by 33 points to 19 to finish preseason on a positive note.
This Bank Holiday Weekend, Gloucester Rugby take over the Gloucester Quays again for the Beach Weekender, with two 20-metre beaches set up for a weekend of sporting fun and entertainment, in the heart of Gloucester Quays.