The 1988 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts at the Forest National in Brussels, Belgium the event was part of the 1988 Nabisco Grand Prix. It was the eighth edition of the tournament and was held from 21 November until 27 November 1988. First-seeded Henri Leconte won the singles title.[1]
See main article: 1988 Donnay Indoor Championships – Singles. 
Henri Leconte defeated Jakob Hlasek, 7–6(7–3), 7–6(8–6), 6–4
See main article: 1988 Donnay Indoor Championships – Doubles. 
Wally Masur / Tom Nijssen defeated John Fitzgerald / Tomáš Šmíd, 7–5, 7–6