1991 Internazionali Cassa di Risparmio
Date	20–26 May
Edition	7th
Category	World Series
Draw	32S / 16D
Prize money	$225,000
Surface	Clay / outdoor
Location	Bologna, Italy
Venue	Cierrebi Club
Champions
Singles
Paolo Canè[1]
Doubles
Luke Jensen / Laurie Warder[2]
← 1990 · Bologna Outdoor · 1992 →

The 1991 Internazionali Cassa di Risparmio, also known as the Bologna Open, was a men's tennis tournament played on outdoor clay courts at the Cierrebi Club in Bologna in Italy and was part of the World Series of the 1991 ATP Tour. It was the seventh edition of the tournament and was held from 20 May until 26 May 1991. Unseeded Paolo Canè, who entered the main draw on a wildcard, won the singles title.^[3]

Finals

Singles

Paolo Canè defeated Jan Gunnarsson 5–7, 6–3, 7–5

• It was Canè's only singles title of the year and the 3rd and last of his career.

Doubles

Luke Jensen / Laurie Warder defeated Luiz Mattar / Jaime Oncins 6–4, 7–6

• It was Jensen's 3rd doubles title of the year and the 5th of his career. It was Warder's 2nd doubles title of the year and the 8th of his career.