Former Olympic medallist Roger Black believes Dai Greene offers Great Britain their best chance of winning track and field gold at this summer's Games but has also warned against writing off the hopes of reigning 400-metre champion Christine Ohuruogu.
Black, who won 400m and 400m relay silver at Atlanta in 1996, thinks GB have five "realistic" hopes of striking gold at the Olympic Stadium but feels Greene is the best placed of the lot at present.
Greene is the reigning world, European and Commonwealth 400m hurdles champion and the 26-year-old will be desperate to complete the clean sweep in London.
"On their day, there are five realistic chances of medals, if not gold medals, and that's Dai Greene in the hurdles, Mo Farah twice, Jessica Ennis and Phillips Idowu," said Black, who when pushed to pick a leading candidate added: "I wouldn't put my house on anybody, because I know how hard it is. But if I had to I would put it on Dai Greene."
Great Britain returned from Beijing with 19 gold medals four years ago but only one of them came in athletics, with Ohuruogu victorious in the 400m.
Since that triumph, the 28-year-old has suffered badly with injuries and a loss of form and it remains to be seen if she will be able to successfully defend her Olympic crown.
However, she sent out a warning to her rivals with a stunning display to help Britain win the 4x400m relay at the World Indoor Championship in March, and Black believes you write Ohuruogu off "at your peril".
Speaking at the launch of the 2012 Nature Valley games, Black said: "The person slipping under the radar, I think, is Christine Ohuruogu, who has been carrying an injury for two years and is now apparently healthy.
"When you're an Olympic champion and you're healthy - write her off at your peril, that's what I say. I'm not basing that on any facts, she still hasn't raced properly yet, but people that win major championships should never be written off.
"I may be completely wrong, but you sometimes have a hunch. If Christine is healthy I just think she's the kind of person you can't write off. Nobody's talking about her very much because she's had a very average last two years."