Coaches' Corner: Test for Nadal

In the latest Coaches' Corner, Miles Maclagan previews the fourth-round match between Australian teenager Nick Kyrgios and Rafael Nadal.

Maclagan, who used to coach Andy Murray, also looks ahead to Roger Federer's fourth-round match against Spaniard Tommy Robredo and looks at Simona Halep's strengths before she takes on Zarina Diyas.

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