In their long and storied careers, Roger Federer and Rafael Nadal have never played against each other in the US Open.
원문출처 : http://www.cnn.com/2017/09/07/tennis/us-open-day-10-federer-del-potro-nadal/index.html
원문출처 : http://www.cnn.com/2017/09/07/tennis/us-open-day-10-federer-del-potro-nadal/index.html