WBO champion Parker is eager to fight IBF and WBA champion Joshua next, looking to set up a bout in the UK in March.
Parker kept up his relentless pressure on the big Brit with another tweet highlighting what he sees as a susceptibility in Joshua's chin.
"Doesn't a 65-35 per cent between two unbeaten champions sound fair? Nearly double our share. Don't worry, a rematch clause is there in case you're worried about your chin," Parker taunted in his latest social media post.
Parker wants 35 per cent of the fight profit, a sticking point in negotiations, although Joshua's promoter
A rematch clause is massive insurance for Joshua if he did get upset by Parker.
A rematch wouldn't be a worry for the Kiwi given the way the purse is likely to explode for a sequel.
Hearn and Parker's promoter David Higgins have been suspiciously quiet about the fight over the last couple of days – a sign that things are getting serious, as opposed to the name calling that has highlighted the process over the previous two or three weeks.
Photo by: COMPOSITE: ANDREW COULDRIDGE/ REUTER. Caption: Anthony Joshua and Joseph Parker are on a heavyweight boxing title fight collision course.