No mention was made of the Heineken Open which suggested Auckland may not be front of mind for Isner - but Budge is confident the American will make his fourth appearance in Auckland.
"I've already spoken to his agent and the feedback at the moment is that his injury is not that serious," Budge told the Herald on Sunday. "He is very popular here and at this stage I expect him to be out on court this week."
Isner was scheduled to arrive last night and Budge said his only request at this stage was for a "late match" on Wednesday. As one of the top four seeds, Isner receives a bye into the second round, and will most likely be scheduled for a night match.
After the injury withdrawal of world No18 Tommy Robredo last week, the loss of Isner would be a severe blow for the tournament.
The 2.08m American has a great record here. In 2009, ranked 114 in the world, he progressed through qualifying all the way to the quarter-finals, beating two top 50 players on the way; he was only stopped by Swede Robin Soderling, who reached the French Open final that year.
The following year he took the title - but did it the hard way.
All but one of his matches, including the final against Frenchman Arnaud Clement, went to three sets and he also played (and won) four tie-breaks.
On his last visit in 2012, he was knocked out in the quarter-finals by eventual finalist David Nalbandian.