Argentina’s David Nalbandian retained 19th position (1585 points) in the men’s tennis rankings released by the Association of Tennis Professionals (ATP) on April 11, 2011.

Spaniard Rafael Nadal continues to top the rankings, followed by Roger Federer (Switzerland) and Novak Djokovic (Serbia).

Nalbandian had double surgery to his left leg on March 11 that put him out of action for six to eight weeks. The Argentine-Armenian, who also had a back operation last year, was suffering from a hernia in his left groin and a torn lower leg muscle. The 29-year-old aggravated the groin strain during the Buenos Aires Open in February and this was responsible for the muscle tear when he played in Argentina's Davis Cup tie against Romania. His recovery will take six to eight weeks so it is estimated he could be fit to play the claycourt Masters 1000s in Madrid and Rome ahead of the (French Open) tournament at Roland Garros.