Why did Iga Swiatek get a one-month doping ban? What did she test positive for?

Iga Swiatek is the second high-profile tennis player to test positive for a banned substance this year, joining Jannik Sinner. While Sinner, currently the No. 1 ranked man, was fully cleared, Swiatek, who slid from No. 1 to No. 2 last month, accepted a one-month suspension that was announced Thursday.

The International Tennis Integrity Agency said it determined that Swiatek's tainted urine sample was because of a contaminated medicine she took and so she bore a low level of responsibility.

“These are not cases of intentional doping. These are cases — in Sinner’s case ... no fault or negligence. In (Swiatek's) case, very low end, no significant fault or negligence,” ITIA CEO Karen Moorhouse said in a video call with reporters. “So I don’t think this is a cause for concern for tennis fans and the like.”

Here is a look at the details of the two cases: