Anthony Joshua vs. Joseph Parker, billed as Road to Undisputed, was a professional boxing match contested on 31 March 2018, for the unified WBA (Super), IBF, WBO and IBO heavyweight championship.

[5] According to a Tweet from Parker on 15 November 2017, he was offered less than half of what was paid to Charles Martin when he defended his IBF title against Joshua.

[6] The next day, Higgins told Fairfax Media that he and Hearn were still negotiating a deal that would benefit all parties.

[9] According to Hearn on 11 December 2017, a deal was very close to being announced with the Principality Stadium a frontrunner to host the fight.

[10] On 28 December 2017, Higgins announced that a split had been agreed which would see Parker earn between 30–35% of the purse and the fight should take place in April 2018.

[14] On 14 January 2018, negotiations came to a close and the fight was officially announced to take place on 31 March in Cardiff, live on Sky Sports Box Office.

[15][16] In an official press release on 5 February 2018, Showtime announced they would televise the fight live in the United States.

[19] The PPV card began with victories for Joe Cordina and Josh Kelly before former world champion Anthony Crolla won a wide unanimous decision over Edson Ramirez.

The first world title bout on the card saw WBA bantamweight champion Ryan Burnett face mandatory challenger Yonfrez Parejo.

[21] The chief support saw former world title challenger Alexander Povetkin (WBA/WBO:1st, WBC/IBF:4th) face former British and Commonwealth heavyweight champion David Price.

[22] The next day, Price spoke to Sky Sports stating he accepted Hearn's offer and would be willing to fight Povetkin.

[29] Joshua was forced to go the distance to defeat Parker via a 12-round unanimous decision to claim the WBO title as well as retain his WBA (Super), IBF, and IBO belts.

Many media outlets, including ESPN, had the fight much closer, generally around 116-112 with Joshua the clear winner.

Joshua's tape on his left glove kept coming loose and he was ordered to go back to his corner for a re-tape.

Many boxers, pundits and both the Sky Sports and Showtime broadcast team criticised the referee during and after the fight.

So I stuck behind the jab and I made sure anything that was coming back, I was switched on, I was focused and 12 rounds, baby!

Parker was humble in defeat and stated he would back stronger, "Today I got beaten by a better champion, bigger man.

[36] On Sky Box Office, the fight sold 1.457 million pay-per-view buys in the United Kingdom.

Nielsen Media Research., who released the figures do not have the facility to measure whether the same customers that watched the live showing tuned in for the replay.

[39] Confirmed bouts:[40][41] ^Note 1 For IBF, WBA (Super), WBO and IBO heavyweight titles.