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Cardiff’s Principality Stadium is the frontrunner to host WBA-IBF world heavyweight champion Joshua’s attempt to win New Zealander Parker’s WBO belt.
Joshua, 28, stopped substitute opponent Carlos Takam in front of 78,000 underneath the Principality’s closed roof on October 28.
Twickenham and Old Trafford have also been considered but going to the Principality again rules out concerns over the weather at outdoor venues.
Another huge crowd is expected for Joshua-Parker, heavyweight boxing’s first three-title unification fight since Ukrainian Wladimir Klitschko beat Londoner David Haye in 2011.
And it is the fight Watford-born Joshua wanted as he tries to become boxing’s first four-belt world heavyweight champion this year.
Champion boxer Anthony Joshua pictured with adorable son in Dubai
MCP
“Anthony Joshua expects to face Joseph Parker on March 31”
Parker, who has made two title defences, dropped his demands to take 30 to 35 per cent of the purse split, while Joshua is set to earn up to £15million from a fifth title defence.
Parker, 26 on Tuesday, failed to shine in a majority points win over Hughie Fury in Manchester in September and AJ will start a big 1-25 favourite.
If Joshua extends his 20-fight unbeaten record against Parker, he will then likely have to face doping offender Alexander Povetkin in the summer before fighting WBC champion Deontay Wilder.
Povetkin, 38, beat Romanian Christian Hammer in a WBA title eliminator last month and if Joshua wants to keep the belts intact he may have to face the Russian before a clash with American Wilder, who squares up to Cuban Luis Ortiz in New York on March 3.
Another fight to be confirmed this week is Scott Quigg’s crack at WBO world featherweight champion Oscar Valdez at the StubHub Center in Carson, California, on March 10.
Quigg, 29, flies to Los Angeles this week to join up with trainer Freddie Roach and the Manchester boxer reckons victory will make him the world’s best featherweight.
He said: “We’re just waiting for the final draft of the contract to come through, we’ve verbally agreed everything and if everything is put in the contract it’s a done deal. It’s 99 per cent done.
“I think I would become the number one in the division if I win this fight.
“They are talking about building Oscar Valdez up to be a future star and no one wants to fight him. The other top featherweights never mention his name because he will fight anybody and he’s dangerous.”CAPTION: 10pt caption words in here please