Iga Swiatek, the women’s world No. 2 tennis player, has received a one-month doping ban after testing positive for the banned substance trimetazidine (TMZ).

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.

Iga Swiatek received a one-month ban after positive drug test and will be eligible to play in the Australian Open.