The British Olympic Association has received the details of the injury suffered by Phillips Idowu.
The BOA made a public request to see his medical records after the triple jumper pulled out of Team GB's pre-Olympic training camp in Portugal.
Idowu was "incredibly disappointed and surprised" by the request.
"This information will be kept confidential with the Team GB chief medical officer [Dr Ian McCurdie]," said a statement from the BOA.
"We will continue to liaise with and support the professionals who are working with Phillips to ensure he has the support he needs in his treatment."
Gold medal hope Idowu has competed only three times in 2012 and has not been in action since he injured his foot after landing awkwardly at a meeting in Eugene, Oregon, on June 2.
But his latest problems reportedly relate to a hip injury which forced him to pull out of the Aviva Grand Prix at Crystal Palace 10 days ago.
Triple jump landmarks
British triple jumper Jonathan Edwards' world record - set in Gothenburg, 7 August, 1995
The Olympic record, set by Kenny Harrison (USA) in Atlanta, 27 August, 1996
Phillips Idowu's personal best - set in Barcelona, 29 July, 2010
The Olympic gold medal-winning jump by Portugal's Nelson Evora in Beijing four years ago
Idowu's Olympic silver medal jump in 2008
Idowu's best jump on his last outing in Oregon on 1 June
"He's incredibly disappointed and surprised as to why the BOA has chosen to do this," Idowu's agent, Jonathan Marks, said.
"I can't understand the benefit to the athlete."
"Our office has even had a call from a member of the BOA medical team who has also expressed surprise at the organisation's decision to go public with the request.
"Phillips is an athlete who's proven that if he gets to the start line then he is one of those athletes who can win a medal."
The 2009 world champion has struggled to hit top form this season, registering leaps of 16.43m and 17.05m, well short of his personal best of 17.81m. The
Beijing silver medallist
is ranked 10th in this season's global rankings. He is due to compete at the Olympics on 7 August.
BOA spokesman Darryl Seibel said on Tuesday: "Our chief medical officer had a discussion this afternoon with Phillips's representatives and we are awaiting the information that has been requested.
"We are fulfilling the duty of care responsibility we have to every athlete in the delegation."
Dr McCurdie wrote to Phillips and his agent on Monday asking that he provide the relevant medical records relating to his injury and the treatment he is currently receiving.
"The basis for doing this is a clause in our team members' agreement that says athletes are required to provide details of any injury or illness that may impact on their performance during the Games," said Seibel.
"[We need] to make certain we are in a position to provide all the support necessary to help him in his rehabilitation and get him back to full fitness as quickly as possible."
Team GB chef de mission Andy Hunt told BBC News: "The situation is he hasn't gone to the preparation camp in Portugal.
"Let's understand the nature of the injury first. There's no decision to be taken yet."
"My take on it is that he doesn't fancy going away for two weeks to a training camp. He's chosen his own path to get to London 2012 and I hope that's what it is, rather than a serious injury. It would be really, really sad if he wasn't fit enough to compete. But this is what Phillips' character is all about. Everyone's questioning his fitness and then he'll show up and prove to everyone he was fine all along."
Idowu's coach Aston Moore said on Monday that the athlete had decided to stay in London for treatment from a private physiotherapist rather than travel to Portugal.
Moore said: "In training recently Phillips has had an ongoing injury problem and we have not been able to go at things 100%.
"At the weekend, Phillips told me he would continue to seek treatment from a private physio in London and would not travel to prepare in Portugal, although he may join us here later."
Idowu took three jumps on his last outing in Oregon before sitting out the rest of the competition, telling BBC Sport that he withdrew as a precaution due to wet conditions.
After that, he withdrew from meetings in Oslo and Paris and the Olympic trials in Birmingham, with UK Athletics head coach Charles van Commenee declining to clarify Idowu's situation due to issues of "medical confidentiality".
Idowu claimed before the London Grand Prix that he had never mentioned an injury and was happy to let the "rumour mill stir itself", but pulled out of the competition at Crystal Palace with a hip problem he felt while warming up.
He later wrote on Twitter: "Hey guys, sorry to have to pull out of #ALGP, slight bit of muscle tightness. I will be fine in a day or two. Hope the other jumpers put on a great show for you. See you 7 August. Thanks for your support."