Reigning Australian Open champion Sofia Kenin is knocked out in straight sets by Kaia Kanepi

Reigning Australian Open champion is knocked out in straight sets by an unseeded player in surprising upset at Melbourne Park

Reigning Australian Open champion Sofia Kenin has been knocked out of the singles competition in straight sets. 

The American world no.4 suffered a 6-3, 6-2 defeat to unseeded Estonian veteran Kaia Kanepi, 35, at Melbourne Park on Thursday. 

More to come.