- Top seed Halep ousted at New Haven tennis
- US men braced for more Grand Slam misery
- Running out of time in Grand Slam fame game
- Riske upsets Pennetta at New Haven tennis
- South Africa's Anderson battles through
- Davis Cup door ajar for Del Potro as captain quits
- Ukraine's Davis Cup tie with Belgium set for Estonia
- Garcia-Lopez and Nieminen advance at Winston-Salem
- Bouchard cruises into 2nd round in Open tune-up
- Recent US Open men's champions
- Supreme Serena targets 18th major at US Open
- Federer's five US Open titles
- Federer poised to step out of darkness in New York
- WTA New Haven results - 1st lead
- Nadal to miss US Open due to wrist injury
- Federer warms up for US Open with 80th ATP title
- Federer captures 80th career ATP title
- Serena wins first Cincinnati title for US Open boost
- Serena wins first Cincinnati title for key US Open boost
- Serena Williams wins first Cincinnati title
- Ferrer, Federer to clash in Cincinnati final
- Federer reaches Cincinnati final
- Ivanovic ousts Sharapova in three-set thriller
- Ivanovic beats Sharapova to reach final
- Ferrer brushes aside Benneteau, books Cincinnati final
- Ferrer reaches Cincinnati final
- Williams beats Wozniacki to reach Cincinnati final
- Serena beats Wozniacki to reach Cincinnati final
- Sharapova rallies to beat spirited Halep
- Federer ousts Murray to reach semi-finals
Del Potro refuses to play Davis Cup
Former US Open champion Juan Martin del Potro announced Monday he would not be playing Davis Cup tennis for Argentina this year amid an ongoing dispute with his country's federation.
"I will not be playing in the rest of the 2014 Davis Cup season," the 25-year-old said in a statement.
"In November, I published a letter in which I expressed my disagreement with the hypocrisy surrounding the Davis Cup. Since then, nothing has changed. It has even got worse," added Del Potro, currently world number 5.
Argentina have struggled in the absence of their best player, losing in the first round to Italy and facing a play-off in September to maintain their place in the elite world group.
Del Potro has not represented his country in the Davis Cup since a losing semi-final against the Czech Republic in 2012.
He complains that the Argentinian federation does not show him sufficient respect and fails to take into account his court surface preferences.