who become the oldest atp world number one
List of ATP number 1 ranked singles tennis players Lleyton Hewitt is both the youngest world No. 1 (20 years, 268 days) and youngest year-end No. 1,[10][11] while Rafael Nadal is the oldest year-end No. 1 (31 years, 211 days). Roger Federer is the oldest No. 1 (36 years, 314 days).[12]
Tennis Masters Series records and statistics Ivan Lendl and Novak Djokovic are the only players to win all nine events during their careers. However, since the creation of the "Masters 1000" in 2009, Novak Djokovic is the only player to claim all nine ATP Masters 1000 events. Winning all nine events during a career has been called a "Career 'Golden Masters'".[1] Rafael Nadal has won the most number of ATP Masters 1000 singles titles. He has won 33 titles to date. Bob Bryan and Mike Bryan have won the most doubles titles of all-time with 38.