WWE Champion Brock Lesnar and NXT Superstar Matt Riddle were reportedly involved in a “backstage verbal altercation” this Sunday night at the Royal Rumble pay-per-view in Houston, TX.

Pro Wrestling Sheet was told by a source that Lesnar approached Riddle backstage during the show to talk about “the reality of the situation between them”. Unfortunately there are no additional details at this time, although the report was careful to mention that things did NOT escalate into a physical encounter.

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Riddle, a former UFC fighter in his own right, has been talking openly for several years about wanting to retire the “Beast Incarnate” in a professional wrestling ring. The WWE Performance Center released a mini-series on his arrival to the NXT brand last year, in which he was spotted wearing a shirt that blatantly referenced retiring Lesnar.

For what it’s worth, many thought Riddle would have a bigger role in this year’s 30-Man Royal Rumble match. He did not come out until after Lesnar was long gone, and was eliminated in just 41 seconds by King Baron Corbin, of all people.