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The pair couldn't hold back during it, both telling the other to expect defeat on Saturday.
Now, it has been revealed in previously unseen footage released by promoter Matchroom Boxing that this continued back stage, with the boxers still going at each other during the pre-fight rules meeting.
While Pulev repeatedly told Joshua that he respects him, the Bulgarian seemed very sure that he would be leaving the Wembley Arena as the victor.
Joshua didn't rise to the 39-year-old's jibes, eventually leaving the area with a laugh.
The Pulev bout will be Joshua's first bout in over a year. The last time he entered the ring he defeated Andy Ruiz to regain his WBA, IBF, and WBO titles after Ruiz had won them in a shock upset earlier in 2019.
Despite this, the 31-year-old is confident ahead of his latest bout - with victory vital to his chances of a huge unification match up with Tyson Fury in the near future.
Joshua goes into the fight with a similar record to his opponent, but a far better record of knock outs.
With a 23-1 (21 KOs) record to Pulev's 28-1 (14 KOs), the Brit is clearly the more destructive boxer. In addition, Pulev's one defeat came to Wladimir Klitschko, who Joshua famously defeated to announce his arrival on the international scene.
How do reckon it will go on Saturday night?
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