Alexandre Muller of France celebrates with the trophy after winning the men's singles final against Nishikori Kei of Japan at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)

Alexandre Muller of France hits a return during the men's singles final against Nishikori Kei of Japan at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)

Alexandre Muller of France celebrates winning the men's singles final against Nishikori Kei of Japan at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)

Alexandre Muller of France serves during the men's singles final against Nishikori Kei of Japan at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)

Nishikori Kei of Japan hits a return during the men's singles final against Alexandre Muller of France at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)

Nishikori Kei of Japan hits a return during the men's singles final against Alexandre Muller of France at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)

Alexandre Muller of France hits a return during the men's singles final against Nishikori Kei of Japan at the ATP250 Hong Kong Tennis Open in Hong Kong, south China, Jan. 5, 2025. (Xinhua/Lo Ping Fai)