marion jones, alex rodriguez, lance armstrong who finally fessed up to oprah. >> did you ever take banned substances to enhance your cycling performance? >> yes. >> she tested positive for something called meldonium. the darling of tennis now on the defense. >> i was given this medicine by my doctor for several health issues that i was having back in 2006. i was getting sick a lot as well as indications of diabetes. it made me healthy. that's why i continued to take it. >> officials claim it could boost performance. that's why they she doesn't deny taking it but claims she had no idea it's nowout lawed. >> i know many of you thought that i would be retiring today, but if i was ever going to announce my retirement, it would probably not be in a downtown los angeles hotel with this fairly ugly carpet. >> sharapova is provisionally suspended is cooperating and will likely appeal any ban. >> thank you. >>> nick watt, abc news, los angeles. >> what did the carpet ever do to attack her? poor nice carpet. >> oh, boy. >> all right. >> it's sad though. it's a really sad to see a situation. we don'

marion jones, alex rodriguez, lance armstrong who finally fessed up to oprah. >> did you ever take banned substances to enhance your cycling performance? >> yes. >> she tested positive for something called meldonium. the darling of tennis now on the defense. >> i was given this medicine by my doctor for several health issues that i was having back in 2006.

marion jones, alex rodriguez, lance armstrong, who finally fessed up to oprah. >> did you ever take banned substances to enhance your cycling performance? >> yes. >> reporter: sharapova tested positive for something called meldonium, only added to the ban list january 1st this year. the darling of tennis now on the defense. >> i was given this medicine by my doctor for several health issues that i was having back in 2006. as well as indications of diabetes. it made me healthy and that's yes continued to take it. >> reporter: officials claim it could boost performance, that's why they banned it. sharapova doesn't deny taking it but claims she had no idea it's now outlawed. >> i know many of you thought that i would be retiring today. but if i was ever going to announce my retirement, it would probably not be in a downtown los angeles hotel with this fairly ugly carpet. >> reporter: sharapova is provisionally suspended, is cooperating, and will likely appeal any ban. >> thank you. >> reporter: i'm nick watt for "nightline" in los angeles. >> thanks to nick watt for that report. our thanks to