Nishikori tells Asian players to muscle up

Asian players need to work on their strength in the gym in order to mix it with the big hitters on the tour, said Japan's world No 6 Kei Nishikori.

The best Asian player currently in the sport said enhanced physical resilience needs to be matched with rock-solid self-belief to compete with the best in tennis.

Nishikori on Saturday booked his place in the last 16 at Wimbledon, where he will face ninth seed Marin Cilic in a repeat of the 2014 US Open final won by the big-serving Croat.