Medvedev beats Sinner at Wimbledon and next faces defending champ Alcaraz

LONDON — Jannik Sinner felt ill. He was dizzy. Hadn't slept well the night before. Wimbledon's top-seeded man, who recently attained the No. 1 ranking, definitely did not want to quit playing against Daniil Medvedev in the quarterfinals, but things were not looking good.