The boxer, who successfully defended his IBF title and claimed the vacant WBA strap with a dramatic 11th round knockout of Wladimir Klitschko on Saturday, uses the city's English Institute of Sport as his training base.
Joshua only started boxing in 2008 and days after his victory over Klitschko, he has posted an image from the very beginning. Ask him to watch live boxing, Murray admits he struggled to cheer on his fellow Olympian Anthony Joshua beat Wladimir Klitschko - even on TV.
Fury pulled off a huge upset when he outpointed Klitschko in Dusseldorf nearly 18 months ago to win a unanimous decision and become heavyweight champion and said he is not impressed by Joshua.
In terms of mandatory fights, both Kubrat Pulev and Luis Ortiz are entitled to challenge for belts that AJ holds.
Joshua, 14 years younger than Klitschko, was the favorite in the fight.
This will make a good matchup and Parker's trainer, Kevin Barry, seems confident that his fighter is better than Joshua.
A unification bout with America's premier heavyweight and WBC champion Deontay Wilder offers the chance to crack the USA, a reemergence of Tyson Fury could boost British interest even further, while few fight fans would turn down the chance for a repeat of the Klitschko clash should the Ukrainian activate a rematch clause written into the pair's contract.
"The sky is the limit for him now and he is going to dominate the division and make so much money if he just keeps on doing what he's doing", he concluded. "It definitely isn't a pumped-up heavyweight, I can tell you that".
"I think he should carry on only if it matters, but I don't think he should carry it on past one or two fights", said the American.
"I thought Joshua was getting knocked out in the fifth round, I was nearly crying, I thought he was gonna cost me 20 or 30 million quid", added Fury.
Joshua was still feeling the effect of those punches when he was dropped by a right hand in the sixth round. I came back and I fought my heart out. However, after the warm up, Joshua unloads on another shot to test his power again and it looks like the machine may have broken with the heavyweight champion's power shot.