Serena Williams said she would have been banned for 20 years and stripped of her Grand Slam titles had she failed drug tests like men’s world number one Jannik Sinner did last year.
Coco Gauff lost to unseeded Magda Linette 6-4 6-4 on Monday as she missed out on a place in the Miami Open quarter-finals after a tough day for Americans.
Mirra Andreeva fought back to overcome world number one Aryna Sabalenka 2-6 6-4 6-3 in the Indian Wells final, winning a second WTA 1000-level event in a row.
Two-time Indian Wells champion Iga Swiatek avenged her shock Paris Olympics loss to Zheng Qinwen with a 6-3 6-3 win over the Chinese eighth seed.
Novak Djokovic said a majority of players believe favouritism is at play in the tennis anti-doping system and called for it to be overhauled in the wake of cases involving Jannik Sinner and Iga Swiatek.
American tennis star Coco Gauff was brought to tears during her 7-6 (9-7), 6-2 loss to Croatian player Donna Vekić in the third round of the tournament on Tuesday after an intense argument with the chair umpire of the match.