LOS ANGELES- Tennis star Maria Sharapova says she failed a drug test at the Australian Open.
 
A five-time major champion and 7th-ranked player in the world says she tested positive for meldonium, which she has been taking for 10 years for health issues. Meldonium became a banned substance this year.

Less than 24 hours after Sharapova's announcement, Nike announced it would be suspending its contract with the Russian tennis star during the investigation.
 
Sharapova could face a lengthy ban from the International Tennis Federation, possibly ending her season and preventing her from competing for Russia at the Rio Olympics.