Anthony Joshua is the heavyweight champion of the world. Richard Heathcote/Getty Images

Just two weeks ago Anthony Joshua was enjoying the night of his life at Wembley when he defeated Wladimir Klitschko to become the unified heavyweight world champion.

But we reckon this Saturday might just have been even better for him.

The Manchester United fan already knows Jose Mourinho after he queued up to meet the boxer after his win over Charles Martin at the o2 in London.

Jose Mourinho has fixed his defensive crisis #mufc pic.twitter.com/eBnn89U1Qv - PA Dugout (@PAdugout) May 13, 2017

That was last April, when Mourinho was an out of work manager. Just over a year later, Joshua was invited to visit him at a United training session at their Carrington complex.

Mourinho was there to greet him and post for a picture with a United shirt bearing "Joshua 1" on the back.

Joshua broadcasted his visit on Instagram Live, enjoying a penalty shootout with Jesse Lingard and Marcus Rashford, along with some of his friends and members of the coaching staff.

He also took part in some passing drills with captain Wayne Rooney and Phil Jones also involved in the session.

�� Antony Joshua is currently training with United at Carrington Him and Rooney have been in the middle for the last 5 minutes... ��#MUFC pic.twitter.com/QZNt1cIQmF - The Sportsman (@TheSportsman) May 13, 2017

The IBF and WBA champion also posed for pictures with members of the first-team squad -- several of whom also attended his victory over Eric Molina at the Manchester Arena in December.

He'll be hoping United don't suffer a knockout blow in the Europa League final against Celta Vigo on May 24.