Lions flanker Lewis Moody faces a race against time to be fit for first Test contention against New Zealand next week.
The Leicester forward has withdrawn from his place on the bench for Wednesday's clash against Wellington, when he will be replaced by his England colleague Richard Hill.
The Lions confirmed Moody had suffered an injury to his left knee in training, but the apparent seriousness was not revealed until coach Gareth Jenkins spoke to the media in Wellington on Tuesday.
Jenkins revealed that Moody is "out of the selection process" for next Saturday's game against Otago in Dunedin, and that will seriously hamper his Test prospects, given the Lions boss Sir Clive Woodward is likely to have finalised his first choice line-up by early next week.
Moody has not travelled to Wellington, remaining behind at the squad's Christchurch base for further tests.
Three players - Lawrence Dallaglio, Malcolm O'Kelly and Simon Taylor - have already been ruled out of the tour because of injuries.
The possible loss of Moody would be a huge blow, given his versatility at blindside and openside flanker, but it would appear the signs are not good.
Prop Andrew Sheridan, meanwhile, is battling to overcome an ankle injury sustained against the New Zealand Maori last Saturday, raising doubts about his prospects of being fit to face Otago. Like Moody, Sheridan is a serious candidate for the Lions' Test 22.
The British and Irish Lions team to play Wellington on Wednesday is:
J Lewsey (Wasps and England); J Robinson (Sale and England), B O'Driscoll (Leinster and Ireland, capt), G Henson (Ospreys and Wales), G Thomas (Toulouse and Wales); J Wilkinson (Newcastle and England), D Peel (Lanelli and Wales); G Jenkins (Cardiff and Wales), S Byrne (Leinster and Ireland), J White (Leicester and England), D Grewcock (Bath and England), B Kay (Leicester and England), S Easterby (Llanelli and Ireland), N Back (Leicester and England), M Corry (Leicester and England).
Replacements: G Bulloch (Leeds and Scotland), M Stevens (Bath and England), P O'Connell (Munster and Ireland), R Hill (Saracens and England), C Cusiter (Borders and Scotland), S Jones (Clermont Auvergne and Wales), S Horgan (Leinster and Ireland)
Gloucester Rugby CEO Stephen Vaughan was delighted to introduce ADEY Professional Heating Solutions as the club's new main sponsor this week. He spoke to the club website about the exciting new partnership.
Although understandably disappointed following the 40-39 defeat at Exeter, Freddie Burns thought that both teams fully contributed to a great spectacle but that a couple of refereeing decisions were key to the outcome.
Gloucester's final game of the season ended in a narrow defeat in a pulsating encounter at the Exeter Chiefs. The Cherry and Whites went down 40-39, as Gareth Steenson's dramatic late penalty meant that the end of Director of Rugby Nigel Davies' first season in charge ended in defeat. Davies spoke to the official website in the Devon sunshine.
Dave Lewis was in a tough situation on Saturday afternoon - playing for Gloucester against the side he will join next season, Exeter Chiefs. At the final whistle though, Lewis was simply disappointed to have lost the game.
Tongan second row Lua Lokotui is looking forward to catching up with some old acquaintances at Sandy Park when Gloucester take on Exeter Chiefs on Saturday afternoon, as he and his team mates hope to finish the season on a high note.
During a break from training ahead of Saturday's Aviva Premiership fixture at Exeter, centre Henry Trinder hopes that Gloucester build on the momentum from the recent win over Saracens, and expressed frustration that he's hitting form as the season end approaches after missing time due to injury.
Gloucester Rugby may have already clinched their Heineken Cup spot for 2013-14, but Director of Rugby Nigel Davies stressed this week that it's important for Gloucester to finish their season on a positive note at Exeter on Saturday.
Gloucester Rugby CEO Stephen Vaughan spoke to the Official Site this afternoon after he revealed the great news that Kingsholm Stadium was to play host to 4 pool matches of the Rugby World Cup 2015. He spoke of how much it means to the club as a whole and that all the hard work put in with Gloucester's bid had been rewarded.
On an exciting day for both Gloucester Rugby and the City, the Cherry and Whites' own World Cup Winner Jimmy Cowan spoke to the Official Site expressing his delight that Kingsholm had been chosen as a Host City and Venue for the Rugby World Cup 2015.
Anyone who has visited Kingsholm Stadium in the past couple of weeks will have noticed that the pitch isn't quite looking as it normally does. Stadium Manager Dave Balmer explained what work is currently taking place.