• Miami Masters

Sharapova and Serena book quarter-final spots

Maria Sharapova is a five-time Miami Masters finalist but is yet to win © AP

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Maria Sharapova was happy to play Monday's opening match, especially when her work was already done by the time a mid-afternoon shower interrupted play.

"It's nice to see all the players coming back in the locker room, and I'm like, `I'll see you later,'" she said.

Sharapova started early but didn't start well. She won only five points in the first four games before settling down to reach the quarter-finals at the Miami Masters by beating Kirsten Flipkens 3-6 6-4 6-1.

World No.1 Serena Williams had an easier time and eliminated fellow American Coco Vandeweghe 6-3 6-1. Williams could meet Sharapova in Thursday's semi-finals.

But Sharapova has been flirting with an early exit. She endured her second consecutive ragged three-setter, and found herself trailing 4-0 after only 15 minutes.

"I usually like playing the first match, but I didn't start off the way I wanted to," she said. "Nothing was working."

Seeded No.4, Sharapova seemed thrown off by the lack of pace from Flipkens, a tour veteran who hits floating backhands and sometimes slices her forehand as well.

"She's a different type of opponent," Sharapova said. "There are not too many girls that hit a slice backhand 90 percent of the time in the rallies. But I know what to expect from her game. It shouldn't be that much of a surprise."

Sharapova finished with 36 unforced errors and only 13 winners. She also double-faulted 10 times.

But she won - and was ready to leave Crandon Park before most matches had even begun. With the rest of the day free, what was on the schedule for one of the world's most celebrated athletes?

"Not much, actually," Sharapova said. "I like to have my afternoon tea around 5. It's like a Russian tradition. I'll see my dog, spend some time with him, then get treatment, dinner, and then the day is over."

At the top of her to-do list for the rest of the week is winning her first Key Biscayne title. Sharapova has been the runner-up five times, including each of the past three years, but she downplays any frustration regarding her many near-misses.

"Of course you want to be able to hold the winner's trophy," she said. "But you also remember the matches that you got through to get in the position to get to the final stage. It's not like I didn't have my opportunities in those finals; I just didn't take them. That's why you come back and hope for another chance."

Williams seems to be gaining momentum as the tournament unfolds, as usual. She overcame sloppy patches in her first two matches and committed only one unforced error in the second set against Vandeweghe.

But Williams was impressed with the 22-year-old American, and told her so when they met at the net after the match.

"She said, `Listen, you played so well. We've got to play doubles. We'd do so well," Vandeweghe said.

Williams next plays No.5 seed Angelique Kerber, who beat Ekaterina Makarova 6-4 1-6 6-3.

Elsewhere, Serena's sister Venus Williams lost her serve eight times and was beaten by Dominika Cibulkova 6-1 5-7 6-3.

Eighth-seed Petra Kvitova rallied past No.12 Ana Ivanovic, who double-faulted nine times in the final two sets and lost 3-6 6-0 6-0.

Agnieszka Radwanska needed three sets to get past Elina Svitolina. The third seed eventually ran out a 7-6(5) 5-7 6-2 winner to reach the last eight.

Li Na saw off Carla Suarez Navarro 6-0 6-2 while Caroline Wozniacki beat Varvara Lepchenko 6-0 6-1.

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