Madrid Open 2016: Sunday Tennis Scores, Results, Updated Schedule

It didn't take long for the upsets to start pouring in at the 2016 Madrid Open. Top-seeded Agnieszka Radwanska, second-seeded Angelique Kerber and seventh-seeded Roberta Vinci found themselves one-and-done in Madrid on Sunday, all in frustrating fashion.

Radwanska double-faulted six times and was broken 11 times in a 6-4, 6-7 (3), 6-3 loss to Dominika Cibulkova. She got only 53 percent of her first serves in play and actually lost more service points than she won. Clay has long been a difficult surface for the world No. 2, who dropped out in the first round last year at the French Open. 

Kerber, who is looking to build on her first career major championship, halted her own momentum in a shocking loss to Barbora Strycova. The 30-year-old Czech Republic native earned a 6-4, 6-2 win on the back of her strong serve. She won 80 percent of her first serves, faced only one break point, which she held, and was borderline dominant throughout.

Winner	Loser	Score
Dominika Cibulkova	(1) Agnieszka Radwanska	6-4, 6-7 (3), 6-3
Barbora Strycova	(2) Angelique Kerber	6-4, 6-2
(3) Garbine Muguruza	Anna Schmiedlova	6-2, 7-5
(4) Victoria Azarenka	Laura Robson	6-4, 6-2
(5) Petra Kvitova	Lara Arruabarrena	6-3, 6-2
(6) Simona Halep	Misaki Doi	6-0, 6-3
Danka Kovinic	(7) Roberta Vinci	6-4, 6-2
(8) Carla Suarez-Navarro	Timea Babos	3-6, 6-2, 6-3
Laura Siegemund	(9) Svetlana Kuznetsova	6-0, 3-6, 6-3
(10) Timea Bacsinszky	Andrea Petkovic	6-4, 2-6, 6-3

"I'm happy about my performance today. I stuck with the game my coach told me, and I was kind of in the zone and stable, which I'm happy about the most," Strycova said, per the WTA.

Strycova had an 0-5 record against Kerber coming into Sunday, losing in straight sets each time. This time, Kerber seemed out of sorts as she made 22 unforced errors, double-faulted three times and won only 58 percent of her serves. Strycova said it was her patience that helped pay off and lead to those mistakes:

"

We have similar games. She's a very patient player with good defense. It's tough to win a point against her because she puts every ball back. It's difficult for me because I'm a smaller player and I have a similar game to her, so it's difficult for me to be patient, because I'm not a patient person. That's why it's difficult for me to be patient on the court. But I tried to be patient today and it worked; that's the way I have to be on court, and I'm practicing that.

"

Vinci faced a similar problem against the 21-year-old Kovinic, who used her youthful power to her advantage. Kovinic hit six aces and won 70 percent of her first-serve points, as she attempts to inch her way closer to a top-40 ranking. She was also clutch when it counted, winning eight of nine points when facing a break. 

Ninth-seeded Svetlana Kuznetsova was also sent home early, though she at least made it to a third set. Laura Siegemund, a qualifier, earned a 6-0, 3-6, 6-3 win, thanks to a series of saves made on second serve. She won 73 percent of her second-serve points, an anomalous number, and faced only four break points the entire match.

Even the favorites who did advance needed some help. Carla Suarez-Navarro, Timea Bacsinszky and Ana Ivanovic each needed three sets to make the second round. Victoria Azarenka, Petra Kvitova, Garbine Muguruza and Simona Halep were the only top-10 seeds to advance in straight sets. Karolina Pliskova and Lucie Safarova were also able to advance without incident.

Winner	Loser	Score
Alexandr Dolgopolov	Steve Johnson	3-6, 6-3, 7-6 (4)
Fernando Verdasco	Juan Monaco	7-5, 7-6 (3)

On the men's side, there only were a pair of first-round matches. Alexandr Dolgopolov defeated Steve Johnson in a 3-6, 6-3, 7-6 (3) comeback thriller to advance, while Spaniard Fernando Verdasco gave the home crowd something to cheer about with a 7-5, 7-6 (3) win over Juan Monaco. 

Most of Sunday's matches were qualifiers, including one other semi-notable upset. Top-seeded qualifier and native Spaniard Marcel Granollers bowed out early following a 6-4, 6-4 loss to Radek Stepanek. Granollers failed on seven of his 10 chances to break Stepanek, failing to take advantage of his opponent's inconsistency on first serves.

The results at the bottom of the men's bracket aren't likely to make much impact, but we could have said that a day ago about the women's qualifiers. That top-seeded stars are dropping like flies here is a bit of a surprise. Top players are supposed to be peaking at this point in preparation for the French Open. Instead, they'll be taking an extended break while a few unheralded players attempt to make their mark.