Toshihide Matsui (松井 俊英, Matsui Toshihide; born 19 April 1978) is a professional Japanese tennis player. He has a career-high ATP singles ranking of No. 261 achieved on 12 June 2006 and a doubles ranking of No. 121 achieved on 27 May 2024. He is currently the oldest active singles player in the ATP world doubles rankings.
Source: “Toshihide Matsui”, English Wikipedia (CC BY-SA 4.0), excerpt
