LONDON – Nearing defeat, Daniil Medvedev suddenly switched tactics at the ATP Finals and collected the biggest title of his career by beating U.S.
Open champion Dominic Thiem 4-6, 7-6 (2), 6-4 on Sunday.The fourth-ranked Medvedev became the first player to beat each of the men who were Nos.
1-3 in the season-ending championship — and only the fourth to do it at any tour event in the past 30 years.The comeback against No.
3 Thiem, which lasted more than 2 1/2 hours, added to victories Medvedev produced against No. 1 Novak Djokovic in the round-robin portion of the tournament and No.