单打 (dānda) means "singles" in the context of racket sports such as tennis, badminton, and table tennis. It refers to a match played between two individual players rather than teams. The opposite term is 双打 (shuāngdǎ), meaning "doubles."
她拿下了女子单打的冠军。
tā náxià le nǚzǐ dāndǎ de guànjūn.
She won the women's singles championship.
单打比赛比双打更考验个人能力。
dāndǎ bǐsài bǐ shuāngdǎ gèng kǎoyàn gèrén nénglì.
Singles matches test individual ability more than doubles.
他在羽毛球单打项目上进步很快。
tā zài yǔmáoqiú dāndǎ xiàngmù shàng jìnbù hěn kuài.
He has been improving very quickly in badminton singles.