Rafael Nadal, Lucas Pouille, John Isner, Alexander Zverev and Marin Cilic, here is the Top 5 hot shots of Friday in Davis Cup.

John Isner: ''I never could have imagine it. It's the best moment of my career''

John Isner saves crucial break point in style against Alexander Zverev in Miami !

Superb point from Alexander Zverev to save a set point against John Isner in Miami.

Touchy volley from Frances Tiafoe on break point against Tomas Berdych at Miami.

No-look backhand winner from Juan Martin Del Potro against Kei Nishikori in Miami.