Denis Shapovalov stunned Nadal to reach Rogers Cup quarters.

Wildcard Shapovalov came from a set down to beat top seed Nadal 3-6 6-4 7-6 (6-4) and become the youngest player to reach a Masters 1000 quarter-final.

Nadal's loss means Andy Murray remains world number one, but only until next week's Cincinnati Masters, where Nadal or Roger Federer will replace him.

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Federer also progressed to the last eight, with victory over David Ferrer.

The Swiss world number three, 36, came from a set behind to beat the Spaniard 4-6 6-4 6-2 and next faces Roberto Bautista Agut, also of Spain, who defeated Frenchman Gael Monfils 4-6 7-6 (7-5) 7-6 (6-2).

World number 143 Shapovalov, the 2016 Wimbledon junior champion, plays 29-year-old Frenchman Adrian Mannarino.

In the other quarter-finals, Germany's Alexander Zverev, who beat Australian Nick Kyrgios 6-4 6-3, will play South African Kevin Anderson, who saw off American Sam Querrey 6-4 6-1 in the last 16.

And Argentina's Diego Schwartzman will face Robin Haase of the Netherlands. Haase beat Bulgaria's Grigor Dimitrov 7-6 (6-3) 4-6 6-1, while Schwartzman defeated American Jared Donaldson 0-6 7-5 7-5.