Matchroom boss Eddie Hearn is reluctant to jump the gun and take for granted any imminent deal between Anthony Joshua and Joseph Parker.
Duco boss David Higgins stated previously he'd be unwilling to fly to the UK unless an agreement was close but headed to British shores this week.
Hearn is now ready to go over the finer points of a unification between the two world heavyweight champions on Tuesday and remains hopeful things go smoothly.
"David Higgins landed this morning and we are meeting this afternoon to plough through the agreement and solve any outstanding issues," Hearn exclusively told Sky Sports.
"If we can do that then it's likely Joseph Parker will jump on a plane towards the end of this week. Fingers crossed," he added.
A date of March 31 at the Principality Stadium in Cardiff has already been placed on the table, whilst Twickenham Rugby Stadium and a date in April are yet to be ruled out.
Joshua and Parker will be fighting over four championship belts once an agreement finally gets over the line, with the winner potentially then moving on to battle Alexander Povetkin in the summer.
Tyson Fury is also back in the mix, alongside WBC ruler Deontay Wilder giving the unified king plenty of options upon completion of the contest this spring.