SERENA WILLIAMS insists she would have been stripped of grand slam titles and given a 20-year ban had she failed a drugs test in the manner of Jannik Sinner.

Sinner is serving a three-month suspension that expires on May 4 after returning two positive tests for the banned anabolic steroid clostebol last year.

The 23-year-old from Italy, who remains world number one despite his absence, reached an agreement with the World Anti-Doping Agency (Wada) after claiming he had been inadvertently contaminated while being massaged by a member of his team.