Del Potroi takes on Nadal in semi-final match at the US Open Tennis Championship in New York
Juan Martin Del Potro of Argentina returns the ball to Rafael Nadal, third seed, of Spain, in the first set of their semi-final match at the US Open Tennis Championship on September 13, 2009 in New York. UPI /Monika Graff .
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Tournament wins allowed Tommy Haas and Stanislas Wawrinka to inch up in the men's tennis rankings going into the masters-level Madrid Open.
World No. 5 Rafael Nadal and relative newcomer Lukas Rosol each picked up tournament titles, but only Rosol moved up in the world rankings.
Roger Federer, who decided to pass up this year's Monte Carlo Rolex Masters, returned to the world No. 2 ranking in men's tennis Monday.
World No. 1 Novak Djokovic again needed a third set Thursday before he was able to advance to the quarterfinals of the Monte Carlo Rolex Masters.
Grigor Dimitrov posted a straight-set upset victory Tuesday in second-round play at the Monte Carlo Rolex Masters tennis tournament.
Tommy Robredo and John Isner each won ATP tournaments last week but only Robredo saw a change in his world ranking.
Andy Murray, David Ferrer and Richard Gasquet all improved their standing in the men's world tennis rankings, which were updated Monday.
Novak Djokovic ended a long night of tennis at the Sony Open Friday by dismissing Lukas Rosol in just 53 minutes.
Bernard Tomic led a wave of unseeded players into the second round of the Sony Open Thursday with a win over Marc Gicquel.
Rafael Nadal collected a record 22nd ATP Masters trophy after winning his third consecutive tournament of 2013 and improving his world tennis ranking.
