Víctor Pecci Sr. (born October 15, 1955) is a Paraguayan former professional tennis player.

Pecci is famous for reaching the 1979 French Open final.

He beat Guillermo Vilas in the quarterfinals and Jimmy Connors in the semifinals, but lost to three-time champion Björn Borg in the final.

Pecci won the French Open boys' singles in 1973.

Note: The Australian Open was held twice in 1977, in January and December.