According to a report from ProWrestlingSheet.com, WWE NXT Superstar Matt Riddle and current WWE Champion Brock Lesnar got into an unscripted verbal altercation backstage at tonight's WWE Royal Rumble pay-per-view.

According to their report, Lesnar and Riddle crossed paths in a hallway and Lesnar said something to Riddle about wanting him to know that there is a problem between the two of them.

As fans might be aware, Riddle has done interviews in the past where he has openly stated that he wants to be the one to retire Brock Lesnar.