The 1984 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts in Brussels in Belgium the event was part of the 1984 Volvo Grand Prix. It was the fourth edition of the tournament and was held from 5 March until 11 March 1984. Second-seeded John McEnroe won the singles title.
See main article: 1984 Donnay Indoor Championships – Singles. 
John McEnroe defeated Ivan Lendl, 6–1, 6–3
See main article: 1984 Donnay Indoor Championships – Doubles. Tim Gullikson / Tom Gullikson defeated Kevin Curren / Steve Denton, 6–4, 6–7, 7–6