She won her first Grand Slam match at the 1986 French Open when she had a double bagel win over Amanda Tobin.

[4] An unseeded player, she managed wins over three seeds, Angeliki Kanellopoulou, Isabel Cueto and Sabine Hack, before accounting for Laura Garrone in an all-Italian final.

[5] She started 1991 by making the quarterfinals at Hilton Head, a run which included a win over top-10 player Katerina Maleeva.

A member of the Italy Federation Cup team in 1991, Bonsignori made a brief appearance in the World Group quarterfinal tie against Germany in Nottingham.

With the Germans having secured the tie, Bonsignori made her tournament debut by partnering Linda Ferrando in a dead rubber.