Serena Williams comeback: Seven-time Wimbledon champion says doping protocols almost put her off making return

Serena Williams, the 44-year-old 23-time Grand Slam singles champion, has revealed that the 'gruelling' anti-doping testing protocols nearly prevented her from making a comeback to professional tennis. The American superstar returned to competitive action in the Queen's doubles earlier this month before deciding to pursue a singles comeback at Wimbledon. Williams is one Grand Slam title short of Margaret Court's all-time women's record of 24.