Career
Biwersi was a referee for the German Football Association between 1965 and 1978. He refereed 121 games in the Fußball-Bundesliga and 27 games in the 2. Fußball-Bundesliga in this time.
One of his last matches was the record Bundesliga victory, Borussia Mönchengladbach 12–0 Borussia Dortmund.
Since there were no ball boys in the 1970s, Biwersi had to go and fetch the balls which had been shot past Dortmund"s goal. From 1969 until 1978, Biwersi was also a Fédération internationale de football association referee.
He was in charge of 16 international matches and 26 European Cup games.
