Resolution criteria

This market will resolve to "Yes" if any player other than Carlos Alcaraz or Jannik Sinner wins a Grand Slam men's singles title in 2026. The four Grand Slam tournaments in 2026 are:

• Australian Open: January 12 - February 1, 2026

• French Open: May-June 2026

• Wimbledon: June-July 2026

• US Open: August-September 2026

Official tournament websites and reputable sports news outlets (ATP Tour, ESPN, official Grand Slam sites) will serve as sources for determining winners.

Background

In 2025, Jannik Sinner triumphed at the Australian Open and Wimbledon, and Carlos Alcaraz reigned at Roland Garros and the US Open — the dominant duo winning all four Slams between them for the second straight season. Alcaraz and Sinner have won nine of the last 10 Grand Slam singles titles, with Sinner winning the 2025 Australian Open.