The 1979 Nations Cup, also known by its sponsored name Ambre Solaire Nations Cup, was a men's team tennis tournament played on outdoor clay courts. It was the third edition of the World Team Cup and was part of the 1979 Grand Prix circuit. It took place at the Rochusclub in Düsseldorf in Germany from 7 May through 14 May 1979. Total prize money was $250,000 and in total 44,500 people attended the event.[1][2]Spain were the defending champions but did not compete that year. Australia defeated Italy in the final, which was delayed by one day due to rain, to win the title for the first time.[3][4]
The draw consisted of eight teams divided over two round-robin groups. The two best ranked teams from each group proceeded to the semifinals. Each match consisted of two singles and a doubles.