The World No.1 is the fastest server of the year, but a WTA Rising Star from the Czech Republic has just made a very impressive debut on the fastest servers list.
WTA Staff

MELBOURNE, Australia - IDS has updated its lists of fastest servers and while the leaders aren't that much of a surprise - Serena Williams has the fastest serve of the year, Sabine Lisicki still has the fastest serve of all time - there's a young Czech who has made a very impressive debut.

Denisa Allertova, a 21-year-old up-and-comer, ripped a 124.9mph serve (201.0kph) against Alizé Cornet in the second round. She would fall to the No.19-seeded Frenchwoman, 6-4, 6-7(2), 6-2, but that serve was the second-fastest serve of the year so far and the eighth-fastest of all time.

The Australian Open was only Allertova's second WTA main draw, and if the first two are anything to go by, she's got a big career ahead of her. She made her WTA main draw debut as a qualifier at Luxembourg last October, upsetting Top 40 players Lisicki and Varvara Lepchenko and making it all the way to the semifinals. She came out of the qualies in Melbourne too, reaching the second round.

This week she broke into the Top 100, going from No.107 to No.91 after that result Down Under.

Who are the 10 fastest servers of 2015 and all-time? Click here or on the image below to find out!

Denisa Allertova