Rotterdam Open winner

Federer becomes oldest ATP world number one

Fresh from winning his 20th grand slam title in Melbourne this month, Federer took a wildcard into the ABN AMRO World Tennis event with his eyes fixed on a return to number one for the first time since November 2012 at the age of 36 years and 195 days.

Needing to reach the last four to overtake great rival Rafael Nadal, Federer showed some early nerves in his quarter-final clash in the port city's Ahoy Arena, dropping serve in the ninth game on his way to conceding the first set.