Doping hearing clouds Sinner credentials for tennis greatness - Pogba: I considered retiring before doping reprieve - Niroshan Dickwella suspended for doping violation - UK swimming legend Peaty laments 'lack of transparency' amid China doping row - Adam Peaty speaks out on swimming doping scandal as China win dominant gold - Olympic swimmers speak out about Chinese doping; and Britain's Adam Peaty says they should be out - Former Wales scrum-half Rhys Webb given four-year ban for doping positive - Paul Pogba handed four-year ban for doping - France and Juventus midfielder Paul Pogba banned for four years for doping - Dwain Chambers keen to advise British athletes on dangers of doping