There is no love lost between the pair after Chelsea legend Terry was accused of racially abusing Ferdinand's brother, Anton, in 2011.
And the bad blood resurfaced on Thursday after the Manchester United icon put Terry fifth in his list of greatest Premier League defenders, placing himself top.
Terry hit back with a post on Instagram, displaying his most impressing career stats, alongside the caption: "Opinions are great but stats don't lie."
And Ferdinand responded by calling out the former Blues defender.
The ex-Red Devils star wrote on Twitter: "@JohnTerry26 The moment one has to start pushing their own records and stats it's really time to start addressing the fragile ego.
"You're lucky I even put you in the top five after the racism case with my brother so be thankful you made it."
Terry hit back: "A fragile Ego is putting yourself at Number 1. Thanks for putting me in your top 5."
The former Chelsea captain was handed a four-match ban and a £220,000 fine by the FA after the allegation of racist language towards Anton during a match against QPR, but was cleared in court after being charged.
Rio cut ties with Terry following the incident and labelled his ex-England teammate an 'idiot' in a 2014 autobiography.
Amid Anton's 2020 documentary 'Football, Racism and Me', Terry responded to claims he never reached out to the Ferdinand brothers.
He told the Times: "It's disappointing to read and hear that I've never reached out.
"I tried to phone Rio and Anton on numerous occasions, literally the same night [as the game], the day after, and that week after the incident.
"Then about three, four years ago, I see Rio on the beach in Dubai, so I approached him and said, 'Have you got five minutes? I'd like to talk to you'.
"He was like, 'I don't want to talk to you, JT'."
Ferdinand did, however, praise Terry for his footballing ability while discussing his list with Liverpool defender Virgil van Dijk.
He said: " In terms of his longevity at that club, what they won, body on the line, a much better footballer than people give him credit for, could play off his left and right foot."
Both Terry and Ferdinand are widely considered two of the greatest Premier League centre-backs in history, with 11 titles between them.