The Association of Tennis Professionals (ATP) released a ranking list on October 22, with Argentina-based David Nalbandian dropping to 77th place with 635 points.
Earlier, Nalbandian announced a decision to discontinue his tennis tour until 2013 over a serious rib injury.
Swiss Roger Federer tops the list with 12165 points. Serbia's Novak Djokovic comes second with 11970 points;England’s Andy Murray is placed 3rd with 7690 points.
