TENNIS has been stunned by another doping case involving one of its most high-profile players after it was revealed today Iga Swiatek has been given a one-month suspension.

The Pole was ranked world number one when she provided a sample containing the angina medication trimetazidine in an out-of-competition test on August 12.

The International Tennis Integrity Agency accepted the player’s explanation that contaminated medication was the cause of the positive test, with a statement reading: “The ITIA accepted that the positive test was caused by the contamination of a regulated non-prescription medication [melatonin], manufactured and sold in Poland that the player had been taking for jet lag and sleep issues, and that the violation was therefore not intentional.”