1991 Croatian Lottery Cup

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.

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.