OLEKSANDR USYK welcomed the WBC belt to the "family" in his first social media post since beating Tyson Fury.
The Ukrainian, 37, became the first undisputed heavyweight champion since Lennox Lewis with a thrilling split-decision victory over Fury in Saudi Arabia.
He already held the IBF, WBA and WBO world titles heading into the bout, adding the WBC strap to his collection with the win over Fury.
And just hours after his epic victory, Usyk took to as he posed with his new belt.
Alongside the picture, he added the caption: "Welcome to the family."
Usyk's injuries from the fight were also on show for all to see in the snap.
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Bruises and marks were visible around both of his eyes as the brutal nature of the clash was reflected in the state of his face.
The post came after a visit to the hospital for Usyk.
He was taken to see medics in the immediate aftermath of the fight with Fury claiming the Ukrainian had a broken jaw.
The magnitude of Usyk's achievement was hailed by those in the comments section of his Insta post as they congratulated him on becoming a two-weight undisputed champion.
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One said: "Your name will forever be stamped in the history books of boxing 🔥🔥🔥."
Another added: "Respect from a volunteer combat medic that fought in Ukraine."
A third replied: "Top 5 greatest boxer of all time 🙌."
While a fourth responded: "Usykaa, you're a legend in the making! Your win is a proud moment for Ukraine and a testament to the supremacy of Ukrainian boxing.
"Your skill, power, and heart have earned you a place in the boxing hall of fame. Congratulations on your well-deserved victory!"
TYSON FURY VS OLEKSANDR USYK AS IT HAPPENED: RELIVE ALL THE ACTION FROM THE UNDISPUTED WORLD TITLE THRILLER
For all the love for resurgent AJ... these two are head, shoulders and fists ahead of everyone else
OLEKSANDR USYK is the deserved undisputed heavyweight champion of the world, writes Wally Downes Jr
A great biggun doesn’t always beat a great littleun, not when David has the weight of a besieged nation on his shoulders and is able to swing each compatriot into every punch.
Usyk did what Usyk does, he moved magnificently, he counter punched and he outworked his taller and heavier opponent.
He somehow manages to use every physical disadvantage to his favour.
But what the hell is Fury doing getting up in round nine?
Why is a father-of-eight with £300million in the bank, three best-selling books and a Netflix series going to the well like?
Britain is not fighting back Putin’s army, Morecambe is not occupied.
So when the 35-year-old’s senses are scrambled, when the canvas is calling him, when he is so desperate not to be felled he is willing to bounce around all the ropes like a drunk, when he eventually has to collapse into a corner, why doesn’t he just stay down?
He has earned the right to surrender as well as his millions.
The sheer courage and guts and bloody mindedness it takes to climb off that deck, with a broken nose and a crumbling ego is not comprehensible to us mortals.
Fury said he felt he won the fight but was too dignified to call robbery or corruption, no doubt his dad will taint that decency by the time you’ve read this.
The rematch will be superb.
Because for all the love we have for a resurgent Anthony Joshua – who was ringside for that iconic event – these two polar opposite men are head, shoulders, fists, hearts and brains ahead of everyone else.
There is the top two, then there is a void and then there is the rest.
Read Wally's big fight verdict in full here...