Kei Nishikori urged Asia’s young tennis players to head to Europe or the United States to realize their potential after he reached the third round in Melbourne.The Japanese fifth seed, who toiled for more than 3 1/2 hours in a first-round five-setter with Andrey Kuznetsov, won 6-3, 6-4, 6-3 in just over two hours against 72nd-ranked Jeremy Chardy.Nishikori’s fourth successive victory over the Fren… Kei Nishikori urged Asia’s young tennis players to head to Europe or the United States to realize their potential after he reached the third round in Melbourne.