According to Ryan Satin of Pro Wrestling Sheet, Brock Lesnar and Matt Riddle got into a verbal altercation while they were both backstage at the Royal Rumble PPV.
Here is what Satin wrote about the incident:
Pro Wrestling Sheet has learned Brock Lesnar and Matt Riddle got into a backstage verbal altercation prior to Royal Rumble.
Details are scarce at this time, but sources tell us Lesnar and Riddle passed each other while walking backstage and a tense encounter ensued. One source says Brock saw Matt and wanted him to know the reality of the situation between them.
According to three sources, the encounter was real and not something for the show.
Satin added that things did not get physical between the two. It was strictly a verbal altercation.
We will let you know if we hear anything more. Riddle also got into a verbal altercation with Goldberg at Summerslam.
On a related note, check out my predictions for the Elimination Chamber.