Yugoslav Teen Upsets 4th-Seed Kent Carlsson in German Open

HAMBURG, West Germany —  Teen-ager Goran Ivanisevic of Yugoslavia upset defending champion Kent Carlsson of Sweden 7-5, 4-6, 6-1 in the second round of the German Open men’s tennis tournament today.

Carlsson, seeded fourth, was the highest-ranked casualty on the red clay of Hamburg’s Rothenbaum club in today’s action.

Ivanisevic, 16, was a quarterfinalist at the Australian Open and a semifinalist at the Nice tournament last month.

Another seed was ousted when Jan Gunnarsson of Sweden defeated Andrei Chesnokov of the Soviet Union 6-4, 6-3.

Chesnokov was seeded 13th after winning the Nice event and last week’s Bavarian Open in Munich.

Chesnokov said he was tired after a 10-hour train ride from Munich to Hamburg. He then opened another round in the growing dispute between some Soviet tennis players and their federation.

Under Soviet Tennis Federation regulations, Soviet professionals are requested to turn over most of their hard-currency earnings to the federation.

The first to rebel was Natalia Zvereva, the seventh-ranked woman player in the world, and she was later joined by Chesnokov. The two want to keep a larger portion of their prize money.

Chesnokov told reporters that a first round of talks between Zvereva and Soviet tennis officials failed to produce an agreement, but he said he hopes for a compromise.