Feng Tianwei of Singapore serves during the women's singles 3-4 final match against Kasumi Ishikawa of Japan at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Kasumi Ishikawa of Japan serves during the women's singles 3-4 final match against Feng Tianwei of Singapore at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Kasumi Ishikawa of Japan hits a return during the women's singles 3-4 final match against Feng Tianwei of Singapore at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Kasumi Ishikawa of Japan reacts during the women's singles 3-4 final match against Feng Tianwei of Singapore at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Feng Tianwei (L) of Singapore serves during the women's singles 3-4 final match against Kasumi Ishikawa of Japan at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Feng Tianwei of Singapore hits a return during the women's singles 3-4 final match against Kasumi Ishikawa of Japan at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Kasumi Ishikawa (R) of Japan serves during the women's singles 3-4 final match against Feng Tianwei of Singapore at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Feng Tianwei of Singapore reacts during the women's singles 3-4 final match against Kasumi Ishikawa of Japan at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)

Feng Tianwei of Singapore reacts during the women's singles 3-4 final match against Kasumi Ishikawa of Japan at the ITTF-ATTU Asian Cup 2019 in Yokohama, Japan, April 7, 2019. Kasumi Ishikawa won 4-1. (Xinhua/Du Xiaoyi)