For more thoughts on the ATP World Tour Finals, and the upcoming Davis Cup final, listen to the newest TENNIS.com podcast ... but when it comes to playing the Big 4, can he muster that fierce ...

Tennis veteran Stan Wawrinka has revealed who he considers the toughest opponent of his career. Wawrinka is now nearing retirement at 39 following a 23-year-long stint in which he's played some of ...

LONDON (AP)—Juan Martin del Potro is hoping to turn tennis' Big Four into a quintet in 2013 ... can once again challenge the sport's biggest names for Grand Slam titles next season — like ...

Stan Wawrinka might have beaten Rafael Nadal for the Australian Open title in 2014, but he said that the toughest opponent he faced among tennis’ Big Four was the legendary Spaniard. Nadal ...