1991 Norstar Bank Hamlet Challenge Cup – Doubles

Guy Forget and Jakob Hlasek were the defending champions, but lost in the quarterfinals to Eric Jelen and Carl-Uwe Steeb. Eric Jelen and Carl-Uwe Steeb won in the final 0–6, 6–4, 7–6, against Doug Flach and Diego Nargiso.

1991 Norstar Bank Hamlet Challenge Cup – Doubles

Guy Forget and Jakob Hlasek were the defending champions, but lost in the quarterfinals to Eric Jelen and Carl-Uwe Steeb. Eric Jelen and Carl-Uwe Steeb won in the final 0–6, 6–4, 7–6, against Doug Flach and Diego Nargiso.