Briton Andy Murray continued to lead the men's Association of Tennis Professionals (ATP) world singles Rankings released on Monday, with 7,750 points.There were no changes in this week's rankings, as Spain's Rafael Nadal came second, followed by Roger Federer of Switzerland, reports Efe.The current ATP rankings and point scores are as follows:1. Andy Murray (United Kingdom) 7,750 points2. Rafael Nadal (Spain) 7,4653. Roger Federer (S..