London [United Kingdom], Feb 17: Twenty-time Grand Slam champion Roger Federer has become the oldest world number one after he defeated his Dutch opponent Robin Haase at Rotterdam’s ABN Amro World Tennis Tournament. Also Read - Coronavirus in UK Entering 'Period of Particular Concern' as Cases Continue to Rise

London [United Kingdom], Feb 17 (ANI): Twenty-time Grand Slam champion Roger Federer has become the oldest world number one after he defeated his Dutch opponent Robin Haase at Rotterdam’s ABN Amro World Tennis Tournament. Also Read - Birmingham Stabbings: Man Arrested Day After UK Police Launched Search Over Late Night Attacks Across City

According to the Sky Sports, the Swiss great secured his spot in the history books and the last four of the tournament with a 4-6 6-1 6-1 victory against Haase on Friday. Also Read - Birmingham Stabbings: 1 Person Killed, 7 Injured; UK Police Orders Manhunt Across City

The 36-year-old became the oldest No. 1 male player, surpassing eight-time Grand Slam winner Andre Agassi, who holds the record at 33 years since September 2003.