In his career swan song, Kei Nishikori loses to Frances Tiafoe at the Japan Open

Kei Nishikori had an emotional farewell to his tennis career at the Japan Open. Nishikori lost 6-4, 6-4 to second-seeded Frances Tiafoe in the first round on Thursday. The 36-year-old Nishikori, a former U.S. Open finalist with a career-high ranking of No. 4, said earlier in the