Roger Federer, 36, becomes oldest world number one in ATP rankings history
The 20-times grand slam champion says reaching top spot at his age was even beyond his dreams as Rotterdam quarter-final win seals fairy-tale return

If someone had told Roger Federer 13 months ago that reclaiming the world number one ranking would require three more grand slam titles and three Masters 1000s, even he might have declared it mission impossible.
Fast forward a year and a bit, however, and the 36-year-old is back at the summit – the oldest man to make it since the ATP rankings came into being in 1973.
One of the most stunning late-career runs witnessed in any sport has seen Federer put together a sustained spell of brilliance few believed was possible when he missed half of the 2016 season with knee and back problems.
On Friday a 4-6, 6-1, 6-1 victory over Dutchman Robin Haase in the quarter-finals of the ABN AMRO tournament in Rotterdam guaranteed the Swiss would rise to number one for the fourth time in his career.

Fourteen years after he first achieved it, this one felt extra special, said the 20-times grand slam champion.