A spectator has jumped into the ring during the second round and attempted to hit Wassabi but was pushed out of the ring.
The grudge match is being played out at Ovo Wembley Arena in front of a sell-out crowd, after some thrilling undercard bouts.
Deji has not stepped foot in the ring since last summer when Vinnie Hacker secured a three-round TKO victory against the 25-year-old.
On the undercard, Ryan Taylor was disqualified for a disgraceful headbutt on his opponent DK Money.
The bizarre scenes were even then REPEATED as Vitaly was headbutted by Kristen Hanby.