Kei Nishikori extends his record as the man with the highest win % in 5-set matches &amp; deciding sets among active players. 

5-set matches:

28 wins, 7 losses.

Win percentage - 80%

Deciding sets:

148 wins, 56 losses.

Win percentage - 72.55%

Return of the five-set King.

🇯🇵❤️