As of 1st. June 2011, who is the only Swiss Tennis player, other than Roger Federer, to be ranked in the Men's top twenty?
Stanislas Wawrinka STANISLAS WAWRINKA Wawrinka Stan Wawrinka Stanislas Warwinka
wawrinka stan wawrinka stanislas warwinka stanislas wawrinka
stanislas wawrinka
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STANISLAS WAWRINKA