1978 German Open (tennis)

The 1978 German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. The men's tournament was part of the 1978 Colgate-Palmolive Grand Prix circuit, categorized as a four-star event, while the women's tournament was part of the Colgate Series and classified as an A category event. It was the 70th edition of the tournament and took place at the Am Rothenbaum in Hamburg, West Germany, from 15 May through 21 May 1978. Guillermo Vilas and Mima Jaušovec, both first-seeded, won the singles titles.

Men's singles
🇦🇷 Guillermo Vilas defeated 🇵🇱 Wojciech Fibak 6–2, 6–4, 6–2

Women's singles
Mima Jaušovec defeated 🇷🇴 Virginia Ruzici 6–2, 6–3

Men's doubles
Tom Okker / 🇵🇱 Wojciech Fibak defeated 🇪🇸 Antonio Muñoz / Víctor Pecci 6–2, 6–4

Women's doubles
Mima Jaušovec / 🇷🇴 Virginia Ruzici defeated Katja Ebbinghaus /  Helga Masthoff 6–4, 5–7, 6–0