Dominic Thiem
The right-handed Austrian tennis player went pro back in 2011 when he was just 18 years old. He has successfully claimed 8 single titles on the ATP Tour. He is also noted as one of the fastest servers of male tennis when he served at 232 km/h (144 mph) during the 2017 Gerry Weber Open.
Denisa Allertová
All the way from the Czech Republic, Denisa Allertová turned heads when she beat the former women’s number one tennis star, Ana Ivanovic. Her current world rank is 107, but her highest was 55 in 2016. She has served the 13th fastest serve by a female tennis player, at 201.0 km/h (124.9 mph) at the 2015 Australian Open.