1991 Croatian Lottery Cup
Date	22–28 April
Edition	1st
Category	Tier V
Draw	32S / 16D
Prize money	$100,000
Surface	Clay / outdoor
Location	Bol, Yugoslavia
Champions
Singles
Sandra Cecchini
Doubles
Laura Golarsa / Magdalena Maleeva
Croatian Bol Ladies Open · 1995 →

The 1991 Croatian Lottery Cup, also known as the Croatian Lottery Cup – Bol Ladies Open was a women's tennis tournament played on outdoor clay courts in Bol, Yugoslavia that was part of Tier V of the 1991 WTA Tour. It was the inaugural edition of the tournament and was held from 22 April through 28 April 1991. Second-seeded Sandra Cecchini won the singles title.

Finals

Singles

Sandra Cecchini defeated Magdalena Maleeva 6–4, 3–6, 7–5

• It was Cecchini's only singles title of the year and the 11th of her career.

Doubles

Laura Golarsa / Magdalena Maleeva defeated Sandra Cecchini / Laura Garrone 6–3, 1–6, 6–4

• It was Golarsa's only doubles title of the year and the 2nd of her career. It was Maleeva's only doubles title of the year and 1st of her career.