The tennis pro was rushed to a Kenyan hospital last week after developing high altitude pulmonary oedema on the ascent.
"I am feeling much better and really pleased to be going home. I'd like to thank all the staff at Nairobi Hospital, who were wonderful, and really took care of me. The care I received during my three days in hospital was excellent," she said, according to the Daily Star.
"I have also been very touched by all the messages of support I have received over the past few days, and want to thank Laureus Academy Chairman Edwin Moses in particular, for making a very early morning call from Atlanta today to wish me well. It was great to chat to him, although I did joke that perhaps I have gone above and beyond the call of duty for Laureus on this occasion!"