World number one Jannik Sinner captured his first Wimbledon title on Sunday with a commanding four-set victory over arch-rival Carlos Alcaraz, signalling a new chapter in one of tennis’s most thrilling modern rivalries. The 23-year-old Italian triumphed 4-6, 6-4, 6-4, 6-4 on Centre Court, avenging his heartbreaking French Open final…