Meanwhile, Swiatek was found to have been “at the lowest end of the range for no significant fault or negligence” after the 23-year-old Polish player explained that her doping violation was caused by a contaminated supply of the non-prescription medication melatonin, which she uses to help with jet lag and sleep issues.

The five-time Grand Slam champion has served 22 days of a one-month ban from tennis. Here's what you need to know

Simona Halep questioned the "big difference" in how doping cases are treated after world number two Iga Swiatek was handed a one-month drugs ban while the Romanian was out of action for over 18 months following two separate anti-doping violations.