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Daniil Medvedev

Daniil Medvedev of Russia plays a return to Dominic Thiem of Austria during their singles final tennis match at the ATP World Finals tennis tournament at the O2 arena in London.

AP Photo/Frank Augstein

Daniil Medvedev of Russia plays a return to Dominic Thiem of Austria during their singles final tennis match at the ATP World Finals tennis tournament at the O2 arena in London.

AP Photo/Frank Augstein

Daniil Medvedev of Russia holds up the winners trophy after defeating Dominic Thiem of Austria in the final of the ATP World Finals tennis match at the ATP World Finals tennis tournament at the O2 arena in London.

AP Photo/Frank Augstein

Daniil Medvedev of Russia, right, holds up the winners trophy after defeating Dominic Thiem of Austria, left, in the final of the ATP World Finals tennis match at the ATP World Finals tennis tournament at the O2 arena in London.

AP Photo/Frank Augstein

Russia's Daniil Medvedev watches his trophy after the Paris Masters tennis tournament final in Paris. Daniil Medvedev won the Paris Masters for the first time by beating Germany's Alexander Zverev 5-7, 6-4, 6-1 for his eighth career title and third at a Masters event.

Photo by AP/PTI

Daniil Medvedev, of Russia, serves to Frances Tiafoe, of the United States, during the fourth round of the US Open tennis championships, in New York.

AP Photo/Frank Franklin II

Daniil Medvedev, of Russia, top, taps rackets with Christopher O'Connell, of Australia, during the third round of the U.S. Open tennis championships, in New York. Medvedev won the match.

AP Photo/Frank Franklin II

Daniil Medvedev, of Russia, left, taps racquets with Federico Delbonis, of Argentina, after winning his match during the first round of the U.S. Open tennis championships, in New York.

AP Photo/Frank Franklin II

Daniil Medvedev, of Russia, watches a shot to Federico Delbonis, of Argentina, during the first round of the U.S. Open tennis championships in New York.

AP Photo/Frank Franklin II

Daniil Medvedev of Russia, left, and Alexander Zverev of Germany pose with their trophies after the final of the men's final at the Shanghai Masters tennis tournament at Qizhong Forest Sports City Tennis Center in Shanghai, China. Medvedev defeated Zverev 6-4, 6-1.

AP Photo/Andy Wong

Medvedev continued his run with a 3-6, 6-3, 6-2, 7-6 (7-2) win over qualifier Dominik Koepfer.

AP

World No. 5 Daniil Medvedev (R) needed three hours and 19 minutes to see off Feliciano Lopez 7-6 (7-1), 4-6, 7-6 (9-7), 6-4.

AP