Complex sentence: The Davis Cup management committee sought to keep politics from interfering with the competition, and felt the need to take action: the Soviets were also barred from competing in the Federation Cup, as were Czechoslovakia, Hungary, and the Philippines.
Split into simpler sentences: The Davis Cup management committee sought to keep politics from interfering with the competition, and felt the need to take action. The Soviets were also barred from competing in the Federation Cup, as were Czechoslovakia, Hungary, and the Philippines.