Anti-doping authorities are losing the battle against cheats in elite sport according to a top official.

One of the most senior figures in global anti-doping has warned that too many drug cheats in sport are evading detection – and criticised the current system as ‘ineffective’

Anti-doping authorities are losing the battle against cheats in elite sport according to a top official.

Athletics Integrity Unit Chair David Howman delivered the warning about the system's inability to outsmart cheats.