Wimbledon & Watches
Richard Mille RM27-03, £550K
In 2010, Nadal signed a lucrative contract with the Swiss watchmaker, and their relationship has continued until today.
The Spanish star is often seen wearing Richard Mille watches while he's playing, including a £550k RM27-03 model at Wimbledon last year.
Weighing only 20 grams, it won't weigh Nadal's wrist down. And it can withstand 10,000 G's of force.
Audemars Piguet Royal Oak Shore, £45k
When you're one of the most influential figures ever in sport, you'll have luxury companies throwing themselves at you.
Audemars Piguet, a favourite with Premier League footballers, enlisted Serena as a brand ambassador in 2014.
She regularly wears their Royal Oak Shore model when she's in action, and that comes with a price tag of around £45k.
And in 2017, they lent Serena an Audemars Piguet Diamond Outrage worth an astonishing £1m for that year's Met Gala. She must be a great customer.
Seiko Astron GPS Solar Dual Time, £1,495
He might be the world's number one, but he's lagging behind in the watch game.
In 2014, the Serb signed a contract with Seiko worth £4m-per-year, and will be their ambassador until 2020 after recently renewing his deal.
But despite the mega-earnings he's getting, his Seiko watch isn't worth much - coming with a price tag of just short of £1,500.
Still, the watch features a stainless steel case with rose-gold coating and black ceramic bezel, a sapphire crystal glass and a silicone black band with push-button release.
Rolex GMT-Master II, £11K
As a long time ambassador of the Swiss luxury brand, Federer has been snapped lifting a trophy in a variety of different expensive timepieces.
Perhaps the most significant was his Datejust II that he wore after beating Pete Sampras' all-time Grand Slam record in 2009.
He's also a fan of the GMT-Master II, which has a price tag of around £11k.
It's believed that Federer is paid around £5m-per-year by Rolex to peddle their products.
Rado Hyper Chrome Automatic Chronograph Match Point, £3,370
The 2016 Wimbledon champ is said to earn £1m a year to wear Rado watches.
And he's usually on point when it comes to his choice, opting for their Hyper Chrome model on court.
But when he last lifted the trophy at the All England Club, he got himself into bother after his epic win.
Murray strapped on the watch to appease his sponsors, but forgot that it was self-winding and needed time to adjust to the wearer's wrist.
That meant it was around five hours out when he was snapped in winning mode. Oops.
TAG Heuer Formula 1 Lady, £1,900
When the Russian tennis sensation was banned from the sport after failing a drugs test in 2016, TAG Heuer were in talks over negotiating a new sponsorship deal with Sharapova.
However, they soon withdraw their offer and a commercial partnership that began in 2004 was over.
Sharapova often favoured the Aquaracer model on court that cost £1,200, and the Formula 1 Lady outside the court that is valued at around £1,900.
Audemars Piguet Royal Oak Shore Diver, £18k
Stan the man is another fan of the Audemars Piguet Royal Oak Shore watch, often seen wearing their Diver chronograph that's got a price tag of around £18k.
Their relationship began in around 2014, and in 2017 Swiss-star Wawrinka was snapped in an exclusive marketing campaign for the brand.
He also posted images on social media visiting the company's HQ in the village of Le Brassus in the Vallée de Joux in the Canton of Vaud just to see how the watches are made. Now that's dedication.
Richard Mille RM67-02, £105K
The German tennis poster boy has been endorsed by the Swiss luxury watchmaking brand since 2016.
And it was all because of his pal Nadal, who recommended Zverev to Mille - calling him the future of the game.
In 2018, Zverev then presented the RM67-02 watch, with an astonishing price tag of around £105k at a show in Monte Carlo.
It has a weight of just 32 grams and is made of ultra-light and strong carbon quartz TPT, so it's sturdy too. He wears it on court too, matching the straps to his outfit.
Rolex Daytona, £113,950
The former world number one has been with Rolex since 2010, who got her just as she began her ascendancy in the game.
And when she won her first Grand Slam title in 2018 - defeating Simona Halep in the Australian Open - she showed off a sparkling Rolex Daytona with pave diamond dial and baguette-cut diamond bezel.
That watch has an astonishing value of £113,950. Not bad if you can get it.