She's on course to break the all-time grand slam record, but fitness could be the key to Serena Williams achieving that goal, according to tennis Billie Jean King.
원문출처 : https://www.cnn.com/2019/07/02/tennis/serena-williams-wimbledon-2019-coach-spt-intl-gbr/index.html
원문출처 : https://www.cnn.com/2019/07/02/tennis/serena-williams-wimbledon-2019-coach-spt-intl-gbr/index.html