Natural guts used in tennis racquets are made from a part of the cow’s intestine called the serosa. A cow’s serosa has high tensile strength and is long which makes it ideal for tennis strings.

How many cows does it take to produce a tennis string? On average, it takes about three cows to produce a tennis string. That’s because the serosa is a small part of the intestine. Though the cow’s intestine is 120 feet long, serosa is found on only the stretchy outermost layer.

The quality of the serosa varies from freed to breed and from region to region. Cows from the Taranaki  region in New Zealand have produced strong guts and is widely used.

Many tennis players prefer natural guts because of their ability to retain tension and high elasticity. But natural guts can be expensive and break more easily compared to synthetic strings.

Nick Kyrgios has been dating Costeen Hatz since late 2021. Hatzi is the founder of  the home decor brand Casa Armor Interiors, which specializes in elegance and minimalism. She is a blogger and,  Instagram and social media influencer.

Kyrgios had a nasty split with his last girlfriend Chiara Passari, who accused him of cheating on her with another girlfriend. Passari even posted photos to prove her claim that Kyrgios cheated. Before that, he was in a relationship with  Croatian-Australian tennis player Ajla Tomljanović.

But Nick Kyrgios thinks Costeen Hatz is the real deal and that their relationship will last a long time. The couple has not been shy about their relationship, often sharing pictures on social media.

Nick Kyrgios had a great start to the 2022 season by winning the Australian Open doubles title with fellow Aussie Thanasi Kokkinakis. But he is ranked outside the Top 100 in singles because of poor form and playing infrequently on the tour.  Kyrgios reached a peak ranking of world number 13 in 2016. He reached the finals at the 2017 Cincinnati Masters.