Joakim "Jocke" Nyström (Swedish pronunciation: [ˈjoːakɪm ˈnyːstrøːm]; born 20 February 1963) is a former top ten ranked tennis player from Sweden who won 13 singles titles during his professional career.

He was a singles quarterfinalist at both the French Open (1985) and US Open (1985, 1986) tournaments, the 1986 Wimbledon doubles champion with Mats Wilander, and a member of the winning 1985 and 1987 Davis Cup teams from Sweden.

Nyström was part of the generation of outstanding Swedish players in the 1980s and early 1990s, which included Anders Järryd, Jonas Svensson, Mikael Pernfors, Kent Carlsson, Stefan Edberg, Henrik Sundström, Magnus Gustafsson, and Mats Wilander.

Since retiring from tennis, Nyström has served as Fed Cup captain for Sweden and as an assistant coach to Wilander with the Swedish Davis Cup team.

Outside these commitments, he coached both Finn Jarkko Nieminen and Austrian Jürgen Melzer.