!Welcome to Florida Week! As the tours head southeast for the Miami Open, TENNIS.com and Baseline will feature all things Sunshine State. You’ll learn about the personalities, stories, teams and venues that have made Florida one of the tennis capitals of the world. We’ll also be reporting from the Miami Open in Key Biscayne.

As you’ll learn this week, when it comes to tennis, Florida isn’t just a state—it’s a state of mind.

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You could say that Bethanie Mattek-Sands had a good start in Miami.

On Thursday, she ripped a 131 mph ace at 4-4 in the second set against Elina Svitolina. The serve would have tied Sabine Lisicki for fastest in the WTA, but unfortunately it didn't count due to interference.

The American was celebrating her 32nd birthday, and used that positive energy to knock out the world No. 10, 7-5, 6-4.

If you know anything about Mattek-Sands, it's that she's got a lot of energy.

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It's the world No. 158's first win over a Top 10 ranked opponent since Wimbledon in 2015 when she beat Ana Ivanovic.

This year is one birthday she won't likely forget.

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Oh, and Mattek-Sands is the world No. 1 in doubles. She and Lucie Safarova won their opening round on Friday over Taylor Townsend and Jelena Jankovic.

In case you're curious how fast the women's serves are, here's a countdown of the Top 10.

1

131.0 mph (2014 Stanford)

2

129.0 mph (2007 US Open)

3

128.6 mph (2013 Australian Open)

4

126.1 mph (2012 French Open)

5

126.0 mph (2007 Indian Wells)

6

125.5 mph (2014 Australian Open)

7T

125.0 mph (2015 Wimbledon)

125.0 mph (2016 US Open)

9

125.0 mph  (2009 Indian Wells)

10T

124.9 mph  (2007 French Open)

124.9 mph (2015 Australian Open)