High Quality Content by WIKIPEDIA articles! The 1966 Davis Cup was the 55th edition of the most important tournament between national teams in men`s tennis. For the first time, the Europe Zone was effectively split into two zones, and the winner of each would earn a berth in the Inter-Zonal Zone. 46 teams would enter the competition, 32 in the Europe Zone, 8 in the Eastern Zone, and 6 in the Americas Zone.