KUALA LUMPUR: Refusal to give up is one trait that legendary coach Nick Bollettieri sees in many tennis greats whom he has coached during his lifetime.
The 87-year-old has moulded tennis greats such as Andre Agassi, Monica Seles, the Williams sisters Venus and Serena, Maria Sharapova and Kei Nishikori, and they all share the same trait of never giving up when the chips are down.
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