The 29 year-old, who defeated Patrick Mendy in June, was granted the tightest of victories as judges carded 96-94 (twice) in his favour with the other seeing it 95-95 a draw.
British prospect Zach Parker celebrated signing a deal with promoters Sauerland by helping himself to a 14th career win on points over Matingi Kindele.
Former world cruiserweight champion Firat Arslan scored a seventh round stoppage over Alejandro Valori to pick up a 41st career victory. Arslan is aiming for one more crack at a title in 2018 before the veteran eventually hangs up his gloves.
Leon Bauer suffered the first blemish on his thirteen fight career after struggling to a draw with Atin Karabet, before Timo Schwarzkopf saw out an eight round decision triumph over Massimiliano Ballisai.
In the first of a host of super middleweight contests, Denis Radovan beat Tiran Metz on points over eight rounds to make it seven straight wins as a pro, whilst heavyweights Burak Sahin and Albon Pervizaj both won their respective encounters expectedly.