Maria Sharapova showed “a lot of courage” for accepting responsibility for her failed drugs test, says world number one Serena Williams.
Five-time Grand Slam winner Sharapova, 28, revealed on Monday that she tested positive for meldonium in January.
“Most people were surprised and shocked, but happy that she was upfront and very honest,” said Williams, 34.
Sharapova’s ex-coach Nick Bollettieri said the Russian’s test was a “game-changer for life, not just for tennis”.
The 84-year-old American told BBC Radio 4’s Today programme he was shocked former world number one Sharapova tested positive because “she has always been above board in everything”.
He added: “Everybody must accept responsibilities for everything they do in life.