Light heavyweight Nick Hannig of Germany will battle South Africa's Ryno Liebenberg on July 6th in in Wiesbaden, Germany on a card presented by former cruiserweight contender Alexander Petkovic. Hannig is just 7-0 but has been styepping up his competition over the last three bouts. He went twelve rounds in February, defeating Canada's Ryan Ford. Germany.Liebenberg (19-6) is coming of a win in which he stopped hisd compatriot Alfonso Tissen in just five rounds. Promoter Petkovic had a pro career that spanned 1997-2015 and ended with an 18-0-1 mark that left him 50-4-4 for his career. In 2003, Petkovic lost a WBO cruiserweight title shot by majority decision to Johnny Nelson.