1978 Mutual Benefit Life Open

The 1978 Mutual Benefit Life Open, also known as the South Orange Open, was a men's tennis tournament played on outdoor clay courts at the Orange Lawn Tennis Club in South Orange, New Jersey in the United States. The event was part of the 1978 Grand Prix circuit. It was the ninth edition of the tournament and was held from July 31 through August 6, 1978. First-seeded Guillermo Vilas won his second consecutive singles title at the event and earned $15,000 first-prize money.^[3][4][5]

1978 Mutual Benefit Life Open
Date	July 31 – August 6
Edition	9th
Category	Grand Prix
Draw	32S/16D
Prize money	$75,000
Surface	Clay / outdoor
Location	South Orange, New Jersey, US
Venue	Orange Lawn Tennis Club
Champions
Singles
Guillermo Vilas[1]
Doubles
John McEnroe / Peter Fleming[2]

Finals

Singles

Guillermo Vilas defeated José Luis Clerc 6–1, 6–3

• It was Vilas' 4th singles title of the year and the 39th of his career.

Doubles

John McEnroe / Peter Fleming defeated Ion Țiriac / Guillermo Vilas 6–3, 6–3