LESLEY VAINIKOLO has undergone surgery to repair his ruptured right Achilles tendon and will not play again this season.
The Gloucester and England winger underwent surgery from specialist James Calder at the Cromwell Hospital in London on Monday night and will be out of action for at least seven months.
The 29-year-old suffered the injury during the first-half of Gloucester's 22-16 Guinness Premiership victory over Saracens on Saturday, having just helped create a score for full-back Olly Morgan.
Vainikolo has made 17 appearances in all competitions this season and has scored eight tries. In 35 appearances since his debut against Leeds Carnegie last season, when he scored five tries, he has scored 19 times in 35 appearances and has made five appearances for England following his debut against Wales in the Six Nations last season.
"Les is a massive part of our squad, not just for his on-field contributions but because his personality is such an integral and vital part of the group," said Gloucester's head coach Dean Ryan.
"It will naturally leave a very significant gap and with the current injuries we have in the squad at the moment this could not have come at a worse time.
"Les has undergone surgery and when it is appropriate he will begin his rehabilitation process but we appreciate it will be a long road and he will have all the support he needs from everyone associated with the club."
As Gloucester prepare for their 39th game of the season, against Bordeaux-Begles at Sixways on Sunday, David Humphreys told the local media that this week has been all about getting the players mentally and physically ready after a tough game against Connacht last Sunday.
Speaking to GRTV after the 40-32 victory over Connacht on Sunday, skipper Billy Twelvetrees explained that Gloucester had had to learn to be patient and cut out the errors to earn the win and progress to next weekend's final play-off against Bordeaux-Begles.
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.
Premiership Rugby have this morning confirmed the order of fixtures for the 2015/16 season, and Gloucester Rugby will start their campaign at Kingston Park, taking on Newcastle Falcons on Friday 16 October, 19:45.