Tennis star Jannik Sinner congratulated compatriot Kimi Antonelli on winning the 2026 Formula One world championship. Antonelli secured the title with a third-place finish at the Mexico Grand Prix, ending Italy's 73-year wait for another champion. New Delhi: Italian tennis star Jannik Sinner congratulated fellow countryman Kimi Antonelli on becoming the youngest-ever Formula One world champion, sharing a special message for the 20-year-old.