Roger Federer survives Gael Monfils scare

Madrid: Roger Federer saved two match points to defeat Gael Monfils and reach the Madrid Open quarter-finals on Friday but women's world number one and top seed Naomi Osaka was dumped out in a last-eight shock.

Federer, playing only his second match of a 2019 comeback to clay after three years away, needed two hours to defeat French showman Monfils 6-0, 4-6, 7-6 (7/3).

Osaka fell for the second time in two months to Federer's Swiss compatriot Belinda Bencic, exiting 3-6, 6-2, 7-5. Bencic also beat the double Grand Slam winner in March at Indian Wells.

Czech second seed Petra Kvitova, the defending champion, was also a shock loser, going down 6-2, 6-3 to Kiki Bertens, the Dutch seventh seed who was runner-up in the 2018 final.

Men's top seed Novak Djokovic, however, motored into the last eight as he hammered Jeremy Chardy 6-1, 7-6 (7/2) while five-time champion Rafael Nadal dispatched Frances Tiafoe 6-3, 6-4.

Nadal will next play Stan Wawrinka after the Swiss completed a national hat-trick on the day, beating Japan's sixth seed Kei Nishikori 6-3, 7-6 (7/3).

Defending champion Alexander Zverev came from breaks down in both of the last two sets to get past error-prone Pole Hubert Hurkacz 3-6, 6-4, 6-4 and now plays eighth seed Stefanos Tsitsipas.