Why is 2009 US Open champion Juan Martin del Potro so difficult to beat? Jo-Wilfried Tsonga breaks down the Argentinian's game. Watch more player interviews on USOpen.org:
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Why is 2009 US Open champion Juan Martin del Potro so difficult to beat? Jo-Wilfried Tsonga breaks down the Argentinian's game. Watch more player interviews on USOpen.org:
[ Ссылка ]