'Chilled' Swiatek sets up Madrid Open quarters clash against Keys, Svitolina advances with win over Sakkari

Defending champion Iga Swiatek reached her fifth WTA IOOO quarter-final of the season with a 6-0, 6-7 (3/7), 6-4 victory over 13th-seeded Diana Shnaider at the Madrid Open on Tuesday.

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After a nationwide blackout cancelled the majority of play at the Caja Magica on Monday, power was restored at the venue on Tuesday morning, with matches commencing at midday.

In her first meeting with the Russian left-hander, Swiatek saved 11 of 13 break points en route to a two-hour34-minute victory that sent her through to a last-eight showdown with Australian Open champion Madison Keys, who defeated Donna Vekic 6-2, 6-3.

Asked about the power outage, the 23-year-old Swiatek admitted she enjoyed being off the grid for a few hours.

"Honestly, I liked yesterday, I think the whole world was more relaxed kind of, obviously the people who didn’t lose because of this. I had time to rest,” said Swiatek.

“It's good that in Madrid the sun is setting pretty late. As soon as it got down and it was dark, they put the energy back in our area.

“Honestly, I just chilled and used the time not thinking about what I should do. There was no signal so basically no one used their phones. It was nice, I liked it.”