Phillips Idowu was at the Olympic Stadium this morning as he warmed up for triple jump qualifying.
There has been speculation over the Beijing silver medallist's fitness following his late withdrawal from the Olympic trials and last month's London Grand Prix, when he pulled out just 25 minutes before the competition was due to start.
Triple Jumper Phillips Idowu is reportedly suffering from a trapped nerve behind his left knee, according to Sky Sports News.
The gold medal hope has not travelled to Portugal for a pre-Games training camp with the rest of the Great Britain athletes.
The 33-year-old has chosen to remain in London for treatment having recently been troubled by a hip injury.
Former Olympic champion and fellow triple jumper Jonathan Edwards has told ITV News today that Phillips Idowu "thrives on mystery" and that rumours that he may not be able to compete at the Olympics could "help create interest" in the build-up to the Games.
British Olympic bronze medallist Tasha Danvers has told ITV News today that triple jumper Phillips Idowu "may be ready for the Games" but needs "time to get things together". Danvers said that Idowu probably did not want other athletes to be aware of reported injuries.
Triple jumper Phillips Idowu's agent has issued a statement today saying that he is "incredibly disappointed" at the British Olympic Association for making a public request to see his medical records. Idowu did not travel to the Team GB training camp in Portugal citing an injury concern.
Idowu's 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. Jonathan Marks told BBC Spot:
Hackney-born Phillips Idowu is desperate to make the home Games for his last chance to finally land an Olympic gold.
The 33-year-old had been favourite - as the then World Indoor Champion - to win the Men's Triple Jump four years ago in Beijing, but missed out by just five centimetres.
Idowu bounced back to be crowned World Champion a year later, but has raised doubts over his ability to reign supreme this summer amid fears over his fitness in the past two months.
He last competed on June 1 in Oregon, when he took three jumps before sitting out the rest of the competition.
He subsequently withdrew from meetings in Oslo and Paris and the Olympic trials in Birmingham before pulling out of the London Grand Prix with a hip problem he felt while warming up.
August 7 is the date of triple jump qualifying at the London Games, meaning Idowu is quickly running out of time to get himself in top shape.
Phillips Idowu, one of the Team GB's top medal hopes, is due to compete on August 7.
His coach Aston Moore said he has chosen to stay in London for treatment from a private physiotherapist on his hip.
But the BOA told the Press Association that they have requested further details of the injury.
The British Olympic Association have written to triple jumper Phillips Idowu asking for details about the hip injury that has cast doubt on his chances for the Games.
Idowu, 33, failed to travel to a training camp in Portugal yesterday prompting the BOA to seek clarification about his injury.