PARIS, France (AFP) — Roger Federer officially returned to world number one as the latest ATP rankings were released on Monday, replacing old rival Rafael Nadal at the summit. The 36-year-old, who beat Andre Agassi’s record as the oldest-ever No.1 en route to winning the Rotterdam Open title last week, will now look to stretch his lead over Nadal before the start of the claycourt season. “It’s unbelievable to be number one again after all these (six) […]