.World No. 1 Jannik Sinner steers clear of suspension after testing good for outlawed compound Yahoo SportsTennis world No 1 Jannik Sinner will not be actually hung down after testing good for steroid two times, ITIA says Fox NewsATP statement on Jannik Sinner ATP TourWorld No. 1 Jannik Criminal Won't Skin Revocation After Neglecting 2 Tests for PEDs Bleacher Document.