doping

Over the next four years, the incoming IOC president is likely to have to show diplomacy to contend with tensions between the US and China over a doping case involving 23 Chinese swimmers.

Kenyan distance running has been beset by doping scandals in recent years, and Chepngetich was asked about doping after her victory in Chicago.

The 23-year-old Italian, who continues to have a doping case lingering in the background despite being initially cleared of wrongdoing, played impeccably to pick up his seventh title of a remarkable year.

Similarly, British athlete Paula Radcliffe and Australian swimmer Ian Thorpe - superstar names in their fields - felt they had been "tarnished" by wrongly being accused of doping in huge stories of their time.

Since first alerted about the doping violations in early April, Sinner has won tournaments in Halle and Cincinnati and become world number one for the first time in his career.