“The ball is up to now out, that is embarrassing, you are embarrassing your self. Try to be embarrassed,” Dart informed official Kelly Rask.
Their heated dialogue continued into the change of ends, with Dart providing a £50,000 guess that the ball in query was out.
After asking to talk to the event referee, Dart then accused Rask of “threatening” her with a code violation.
An unperturbed Boulter proceeded to serve out the set on the first alternative to pressure the decider.
In it, she broke early on and seemed to be taking management, just for Dart to deliver the set again on serve in a drawn-out sixth sport, doing so on her fifth break level.
However Boulter quickly broke once more and served out the win on her third match level.
Talking after the match, Dart stated the road calling was “fairly appalling” and referred to as for know-how for use throughout the game.
On her dispute with Rask, she stated: “Give me a code violation or do not. I feel she was a bit embarrassed by the scenario. We’re all professionals right here.
“I’ve performed so many tennis matches in my profession and this one was slightly bit disappointing with among the issues. I feel she will additionally replicate on that.”
Earlier, British quantity 5 Heather Watson progressed to the second spherical with a 4-6 6-0 6-4 rain-disrupted win over American Kayla Day.
Watson will subsequent face sixth seed Karolina Pliskova of the Czech Republic.
Elsewhere, British duo Lily Miyazaki and Emily Appleton had been each crushed within the first spherical.
Miyazaki misplaced 6-4 7-5 to Czech participant Linda Fruhvirtova whereas Australian Kimberly Birrell defeated Appleton 6-3 7-5.
Fellow Briton Emma Raducanu will start her Nottingham marketing campaign on Tuesday towards Japan’s Ena Shibahara, whereas high seed and world quantity 10 Ons Jabeur opens towards Colombia’s Camila Osorio.