Leicester City, Arsenal and Chelsea have expressed their disappointment at the publication of doping allegations made against them which they claim are "without foundation".
The three Premier League sides were all named in a Sunday Times report (£) which claims a doctor, named by the newspaper as Dr Mark Bonar, had been secretly filmed allegedly discussing working with numerous professional athletes who used banned treatments.
However, the claims have been rejected by the clubs involved.
"Leicester City follows robust and comprehensive anti-doping protocols to ensure its full compliance and that of its players with all anti-doping rules and regulations", the statement from the Premier League leaders added.
The newspaper's report also claimed a former Chelsea fitness coach Rob Brinded had "collaborated" with Bonar.
"The claims The Sunday Times put to us are false and entirely without foundation," said a Chelsea statement.
Arsenal were similarly dismissive of the allegations, stating: "Arsenal Football Club is extremely disappointed by the publication of these false claims which are without foundation.