The Rugby Football Union and Harlequins have distanced themselves from reports claiming Dwain Chambers will work as a speed coach to some England players.
The sprinter, who this month lost his appeal against a lifetime Olympic ban for doping, allegedly told a British newspaper he was to work with Harlequins trio David Strettle, Danny Care and Nick Easter.
However, a spokesman for the RFU told the Daily Telegraph that England were not involved with the initiative, while Mark Evans, the chief executive of Harlequins, added: "It's got absolutely nothing to do with us.
"We are very happy with our coaching team and have a long link with Tony Lester, who is a very respected sprint coach."
As head coach Stuart Lancaster polishes the axe he will soon wield over his World Cup training squad, Exeter Chiefs coach Rob Baxter has backed Jack Nowell, Henry Slade and Luke Cowan-Dickie to be given a stay of execution.
Italy Under-20s held off a late Samoa blitz to retain their place in the World Rugby U20 Championship on Saturday and head coach Alessandro Troncon believes the experience will have served as a valuable lesson for his young troops.