1981 Monte Carlo Open

The 1981 Monte Carlo Open was a men's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France that was part of the 1981 Volvo Grand Prix circuit. It was the 75th edition of the tournament and was held from 13 April until 20 April 1981. Jimmy Connors and Guillermo Vilas were considered runners-up since the final, which was already postponed to Monday due to rain, was abandoned due to further rain at 5–5 in the first set.^[2]

1981 Monte Carlo Open
Date	13–20 April
Edition	75th
Category	Grand Prix circuit
Draw	32S / 16D
Prize money	$250,000
Surface	Clay / outdoor
Location	Roquebrune-Cap-Martin, France
Venue	Monte Carlo Country Club
Champions
Singles
Match not completed, abandoned due to rain
Doubles
Heinz Günthardt / Balázs Taróczy[1]

Finals

Singles

No winner as the final was abandoned. Jimmy Connors and Guillermo Vilas both received runners-up finishes. Jimmy Connors and Guillermo Vilas 5–5.

Doubles

Heinz Günthardt / Balázs Taróczy defeated Pavel Složil / Tomáš Šmíd 6–3, 6–3