Ivo Karlovic is known as the biggest server in men's tennis. The 40-year-old has hit the most aces in tennis history - at 13,552 (since stats started being kept in 1991). He also holds the single match ace records for the ATP Tour (45), Australian Open (75), Roland Garros (55), US Open (61) and Davis Cup (career-high 78).
The 6 ft 11 inch Karlovic is currently ranked No. 95 in the world and he is also one of the tallest players on the ATP Tour. And his serve has helped him finish 16 of the last 17 seasons inside the world's Top 100 - the only miss coming in 2018 when he finished the year at No.
101. Earlier in 2019, at the Maharashtra Open in India, Karlović reached the final and at 39 years and 10 months, he became the oldest finalist on the ATP Tour since 43 year old Ken Rosewall won the 1977 Hong Kong championship.
But have you ever wondered what would happen if the Croatian served with a wooden racket, that was used by players prior to the Modern era? Dr. Ivo, as he is fondly known, posted a video of the same on his Instagram account, where he used a 75-square-inch wooden racket to serve.
What do you think happens when he serves with that racket? Take a look for yourself and find out.