Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The 1979 Berlin Open, also known as the International Championships of Berlin, was a men's tennis tournament staged in Berlin, West Germany that was part of the Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 18 June until 24 June 1979. It was the fifth and last edition of the tournament. Sixth-seeded Peter McNamara won the singles title.
Peter McNamara
Carlos Kirmayr / 
Ivan Lendl
Patrice Dominguez 6–4, 6–0, 6–7, 6–2
Jorge Andrew /