Juan Martin del Potro delivers a 172 km/hour strike against Novak Djokovic in the quarter-finals on the clay of Rome.

What a forehand winner from Rafael Nadal in the first set of his final against Novak Djokovic in Rome. The Serbian can't even react on this enormous stroke.

Marin Cilic saves four match points before clinching victory over Martin Klizan in the first round on Madrid's clay.

Superb cross court forehand from Richard Gasquet against Julien Benneteau in Rome.

Superb half-volley back to the net from Bethanie Mattek-Sands against Anastasia Pavlyuchenkova in Miami.

Five of Miami's All-Time Best rallies, from Novak Djokovic to Rafael Nadal, passing by Grigor Dimitrov, Nick Kyrgios or Roger Federer.