Forget Messi, Ronaldo or even Saquon Barkley - the two most‑bet‑on athletes in the world right now are Carlos Alcaraz and Jannik Sinner, according to new data from Entain.
The data is based on amount staked between 1st January 2025 to 31st December 2025, a year in which Melbourne was the only men’s singles Grand Slam final in 2025 that did not feature Jannik Sinner taking on Carlos Alcaraz.
Alcaraz-Sinner is an economy that consistently produces the highest betting volumes of any individual athletes in sport. When they face each other, those volumes surge far beyond a typical Grand Slam match. Many anticipated a lull in tennis’ popularity following the retirement of icons like Federer, Nadal and Serena Williams, but the emerging rivalry between Sinner and Alcaraz means we’re seeing younger fans flocking to the sport in record-breaking numbers.
A year of milestones for tennis
- Australian Open 2025: The most attended edition in history also became the most bet-on, with pre-game staking up by a quarter YoY and live betting surging by more than half.
- French Open 2025: Surpassed all previous Grand Slam betting records at Entain.
- Wimbledon 2025: Delivered the highest betting volumes ever for the tournament. Week 1 became the most bet-on Grand Slam week in company history.
- US Open 2025: Smashed all previous records to become the most bet on tennis major of all time.