The rivalry between the WBC lightweight Champion, Devin Haney (30-0), and Shakur Stevenson (20-0), the #4 ranked fighter in his division, has been well-documented. In recent years, old footage of sparring sessions between the two fighters has left boxing fans clamoring for a showdown between the undefeated fighters. While viral clips of a heated argument involving Devin Haney's father, Bill, only caused the anticipation to intensify. Not to be forgotten was Stevenson's infamous death stare after his rival's controversial win over Vasiliy Lomachenko (17-3). Shortly after Haney defeated Loma, Stevenson turned up the heat with antics to get Haney's attention, including a message board with the words "SIGN THE CONTRACT" at a party both men attended. Nevertheless, despite public demand, Haney opted to move up from 135 lbs to 140 lbs for a fight with Regis Prograis (29-1) on Oct. 28. Not only did the move make Haney the WBC lightweight "Champion in Recess," it also meant that a long-awaited fight with Stevenson far less likely to happen anytime soon.

The WBC recently ordered a fight between Shakur Stevenson and Frank Martin (18-0) for Haney's vacated lightweight championship. This is not the fight that Stevenson wanted, but it does provide him with the opportunity to claim his rival's belt. On Monday, Haney and Stevenson added another fiery chapter to their rivalry with a disagreement on Twitter that got very personal.

The back-and-forth started when Stevenson leaked footage of Bill Haney explaining his son's move up to 140 lbs, saying that the 30-lbs division was too hot. (You can watch that clip here). What happened next was an all-out Twitter war, where the fighters threatened each other while also exchanging insults about each other's parents.

Scroll up and swipe right to take a look at the screenshots.

Source: Twitter