Anthony Joshua flies off to Baltimore with promoter Eddie Hearn before travelling to New York for Wladimir Klitschko press conference 

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Anthony Joshua headed off to Baltimore on Sunday to visit Under Armour's headquarters with his promoter Eddie Hearn.

Heavyweight boxer Joshua, who has a sponsorship deal with the sporting brand, took to Instagram to post a photo himself hanging out with Hearn on a plane, captioning the post: 'Baltimore bound.'

Hearn however, was a fair bit more revealing on the matter. He also took to his social media account, commenting: 'Baltimore with Under Armour then NYC for the #joshuaklitschko press conference.' 

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Anthony Joshua is heading to Baltimore with his promoter Eddie Hearn

Hearn then took to Twitter to post a short video of Joshua upon touchdown at Under Armour HQ in Baltimore, going through his paces in a quick warm-up drill. 

Joshua and Klitschko will face off on April 29 as the two titans do battle for the IBF, IBO and WBA Super Heavyweight Championships of the world.

And ahead of the fight, a capacity extension has been given the green light by London mayor Sadiq Khan, meaning 90,000 excited fans will be packed into Wembley Stadium.

This means the much-anticipated bout will match the British record attendance set by Len Harvey and Jock McAvoy at White City Stadium in 1939. 

Speaking to the BBC, Hearn said: 'Sadiq (Khan) urged me to bring the biggest fights to the city and I'm delighted to have the biggest fight in British boxing history at Wembley.' 

Hearn also shared the snap on Instagram, saying the pair will move onto New York next

Joshua, who is currently preparing for the showdown in London, will be quietly confident of securing victory over the Ukrainian as he has won all 18 of his professional fights by knock-out, in a career which has seen a meteoric rise. 

Klitschko hasn't stepped back into the ring since being controversially defeated by Tyson Fury on a points decision back in November 2015.

The Ukrainian surrendered his world title on that occassion, though attempts at a re-match proved fruitless after several cancellations from the Fury camp.

Klitschko has since stated his the upcoming bout with Joshua will be his 'signature fight,' and officially confirmed the clash would take place in the immediate aftermath of Joshua's recent victory over Eric Molina.

Joshua will have his press conference with Wladimir Klitschko while in the Big Apple