The 1981 Trevira Cup was a men's tennis tournament played on indoor carpet courts at the Festhalle Frankfurt in Frankfurt, West Germany that was part of the WCT category of the 1981 Volvo Grand Prix. It was the second edition of the tournament and was held from 30 March until 5 April 1981. First-seeded John McEnroe won the singles title.[4]
^John Barrett, ed. (1982). Slazengers World of Tennis 1982 : The Official Yearbook of the International Tennis Federation (14th ed.). London: Queen Anne Press. p. 182. ISBN9780356085968.