Not many tennis players can boast a winning head-to-head record against the great Roger Federer -- but teenager Alexander Zverev can do just that.
원문출처 : http://www.cnn.com/2017/01/04/tennis/roger-federer-alexander-zverev-hopman-cup/index.html
원문출처 : http://www.cnn.com/2017/01/04/tennis/roger-federer-alexander-zverev-hopman-cup/index.html