Seven months after becoming unified heavyweight champ against Wladimir Klitschko, Joshua called out the Gypsy King, who had ballooned up to 28 stone and was battling with addiction on Twitter.
He tweeted: “@Tyson_Fury get fit you fat f**k.”
The tweet motivated Fury to shed the pounds and make a comeback, which he did in June 2018 with the help of former trainer Ben Davidson.
BT Sport’s Boxing account posted a tweet reminding their followers of the anniversary, which Fury liked and quote tweeted.
He wrote: “With the right mindset and focus you can achieve anything.”
After returning to the ring against Sefer Seferi, Fury would go on to face Francesco Pianeta before his first war with Deontay Wilder, which ended in a controversial split draw.
Back-to-back victories over Tom Schwarz and Otto Wallin followed for the British heavyweight before his emphatic dethroning of Wilder last February.
The pair renewed their rivalry in October and took part in one of the greatest heavyweight fights, with Fury handing him an 11th-round KO victory.