That is the view of British compatriot Amir Khan, who said the heavyweight star needed to raise his profile in the US to become a "global star".
Khan has fought several times in the States, most recently against Saul 'Canelo' Alvarez in Las Vegas, where the Mexican scored a sixth-round knockout in May 2016.
But it was a big-money bout for Khan and brought with it the kind of attention that he feels Joshua – who faces Joseph Parker on March 31 in Cardiff – would easily attract if he showed off his skills for a stateside audience.