My choice is KYRGIOS, Nick (AUS) 19

Which leaves

5 NISHIKORI, Kei (JPN) 6
6 TSONGA, Jo-Wilfried (FRA) 7
7 DEL POTRO, Juan Martin (ARG) PR 7
8 BERDYCH, Tomas (CZE) 8
10 GASQUET, Richard...