London's 2012 Olympic bid team will decide this week whether Mark Lewis-Francis should continue to be involved in its campaign. The Olympic gold medallist was given a public warning by UK Athletics after testing positive for cannabis in March.
London's bid leader Lord Coe told BBC Radio Five Live that Lewis-Francis had been "very helpful" to the bid.
But he added: "We'll have meetings over the next few days and I'm sure my team will reflect on it, as will Mark."
Lewis-Francis, who won 4x100m relay gold for Britain at the Athens Olympics, avoided a two-year ban after claiming he ingested cannabis passively rather than deliberately.
Speaking before the Laureus World Sports Awards in Estoril, Coe was asked if he thought the sprinter had been lucky.
"I have my own views about that and I think a lot of my colleagues and former colleagues in the British team I've spoken to have that view," said the double Olympic gold medallist.
"Let's just recognise Mark is a huge talent and I hope this has acted as one hell of a big wake-up call."
Lewis-Francis is among a host of sporting stars who have promoted London's bid for the 2012 Games.
London is vying with Paris, New York, Madrid and Moscow for hosting rights.
The battle is reaching the closing stages, with the rivals set to find out on 6 June how they fared in the International Olympic Committee's inspections in February and March.
The evaluation report will then be studied by IOC members before they vote for the winner in Singapore on 6 July.
MMIX
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