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The Leicester forward has withdrawn from his place on the bench for Wednesday's clash against Wellington, when he will be replaced by his England colleague Richard Hill.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)
Speaking after his team's exit in the semi-finals, following a 19-14 defeat to the eventual winners the Newport Gwent Dragons, Coach Tim Taylor spoke to GRTV of how pleased he was with how his team acquitted themselves at the Singha Premiership Rugby 7s Finals.
Ben Vellacott was one of the standout performers in last week's pool stages and, ahead of Friday evening's Singha Premiership Rugby 7s Finals, told GRTV that he and his team mates will just try and play their own game once again.
Gloucester Rugby number eight Ben Morgan was today named in England's squad for Rugby World Cup 2015, a reward for eight months of hard work recuperating from a serious injury suffered back in January. Ben was one of a number of players who spoke at a press conference following the squad announcement.
Steph Reynolds led from the front once again as Gloucester kicked off their Singha Premiership Rugby 7s campaign in style on Thursday evening. The flyer scored three tries but admitted that he left most of the team talk duties to others.
Olly Morgan led the Cherry and Whites to three wins out of three in Group B of the Singha Premiership Rugby 7s and he expressed his delight in the young members of the squad in excelling in front of a bumper Kingsholm crowd.
Olly Morgan leads the Gloucester Rugby Sevens squad this Thursday in the Singha Premiership Rugby 7s Series at Kingsholm, and he is backing the young side to take the opportunity with both hands as they take to the field.
Speaking to the local media this week, Henry Purdy explained the opportunity available for the Gloucester Rugby to lay down a marker in this summer's Singha Premiership Sevens Series, which kicks off at Kingsholm Stadium on Thursday 20 August.