1978 Rio de la Plata Championships
The 1978 Rio de la Plata Championships, also known as the River Plate Championships, was a women's singles tennis tournament played on outdoor clay courts in Buenos Aires in Argentina. The event was part of the A category of the 1978 Colgate Series. The tournament was held from 30 October through 5 November 1978. Third-seeded Caroline Stoll won the singles title and earned $6,000 first-prize money.Winners
Singles
defeated Emilse Raponi 6–3, 6–2
- It was Stoll's 1st title of the year and the 1st of her career.
Doubles
/ Valerie Ziegenfuss defeated Laura DuPont / Regina Maršíková 1–6, 6–4, 6–3| Event | W | F | SF | QF | Round of 16 | Round of 32 |
| Singles | $6,000 | $3,000 | $1,800 | $900 | $600 | $325 |
