Iga Swiatek, Jannik Sinner, Simona Halep and Tara Moore have had different experiences after testing positive for a banned substance - BBC Sport looks at why. BBC Sport - Published
Simona Halep has questioned the "big difference" in how doping cases are handled after world number two Iga Swiatek receives a one-month ban. BBC Sport - Published
Five-time Grand Slam champion Iga Swiatek has said being given a one-month doping ban from the sport was the "worst experience of my life". Sky News - Published
Iga Swiatek is knocked out of the WTA Finals after group rival Barbora Krejcikova beat Coco Gauff to secure her place in the semi-finals. BBC Sport - Published
Jessica Pegula beats world number one Iga Swiatek at the US Open to reach a first Grand Slam semi-final, where she will play Karolina Muchova. BBC Sport - Published
Iga Swiatek says a chat with tennis great Serena Williams gave her a "positive kick" for her dominant third-round victory over Anastasia Pavlyuchenkova. BBC Sport - Published
Polish top seed Iga Swiatek sees her 25-match winning streak on the Paris clay ended by China's Zheng Qinwen in the Olympics semi-finals. BBC Sport - Published