The 26 year-old brother of headliner Chris struggled to get clearance to his dressing room initially but eventually made it to the ring to get his career off and running.
Eubank won 40-35 on points.
Further results from Manchester Arena, UK:
In the ITV Box Office opener, Zach Parker wasted no time taking out Adasat Rodriguez after softening his opponent up for the first round.
The next session saw Parker drop Rodriguez twice before Phil Edwards had seen enough and called a halt to proceedings.
In a six round affair, Luther Clay out-pointed Danny Craven but was made to work for it.
At the end, Clay successfully made it to 7-1 courtesy of a 58-57 triumph with the official.
Ryan Walsh and Isaac Lowe fought out a three-way-split draw in a contest which fully deserves a second helping.
The pair battled tooth and nail for the coveted Lonsdale Belt but will need another twelve rounds following scores of 115-113, 114-116 and 115-115.
