Career
Early in his career, Eberhard had his best performances in his home country. He was a quarter-finalist at the Stuttgart Outdoor tournament in 1978 and reached the quarter-finals at Berlin the following year. The West German defeated Peter Elter to make second round of the 1978 French Open.
In 1980 he reached the semi-finals of the Bayerische Motoren Werke Open in Munich and again made the second round of the French Open, beating Spaniard José López-Maeso.
He took part in a tie for the West German team that year, playing two singles rubbers against Swedish players Björn Borg and Kjell Johansson, which he both lost. Eberhard was an Austrian Open and Tel Aviv Open semi-finalist in 1981.
Also that year he reached the quarter-finals in Mexico City. He defeated Mario Martinez in the first round of the 1982 French Open, then lost a five set second round match to John Lloyd.
In 1982 he was a quarter-finalist at the Cairo Open and made the semi-finals in Linz.
Doubles: (1).