Throwback to when Colby Covington congratulated Dustin Poirier and his wife on the birth of their daughter

Colby Covington's 'bad guy' persona has upset a lot of UFC fighters, including Dustin Poirier. However, there was not always animosity between the two top-level UFC contenders, who were once training partners at the American Top Team.

In 2016, the two were still on good terms and Covington hadn't yet developed his heel persona.

Check out the Twitter exchange where 'Chaos' congratulates Poirier and his wife on their newborn baby below:

Given that they have competed in different weight classes throughout their UFC careers, Poirier and Covington have not fought in the octagon. However, that has not stopped Covington from throwing unpleasant barbs at 'The Diamond'.

'Chaos' ridiculed Poirier for crying following his loss to Khabib Nurmagomedov in 2019. The Louisiana native fired back by saying it would be "on sight" the next time they crossed paths, words that Michael Bisping felt were pretty serious.

It's fair to say the former teammates won't be inviting each other over for dinner anytime soon.

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A fight between Dustin Poirier and Colby Covington could happen

Following Dustin Poirier’s loss to Charles Oliveira at UFC 269, 'The Diamond' says he is no longer motivated to make the 155 lb weight cut. Meanwhile, Colby Covington was bested by Kamaru Usman at UFC 268 and is looking for a fight.

During an interview on The MMA Hour with Ariel Helwani, Poirier mentioned his doubts about fighting in the lightweight division in the future:

"I don't know if I'll ever make that cut again. I might never fight at 155 lbs again. I don't know the future."

Watch the full interview with Dustin Poirier on The MMA Hour with Ariel Helwani below:

A move to 170 lb looks increasingly likely for 'The Diamond'. If he were to make a run in the welterweight division, Poirier would most likely have to go through 'Chaos' to get to the gold.