Yu Cheng-yu (; ; born 2 April 1995) is a Taiwanese tennis player.
Yu has a career high ATP singles ranking of No. 531 achieved on 14 August 2017 and a career high ATP doubles ranking of No. 542 achieved on 10 December 2018.
Yu represents Chinese Taipei at the Davis Cup, where he has a W/L record of 0âÂÂ1.