World number one Iga Swiatek lost 6-2 6-7 (4-7) 6-4 to Jessica Pegula in the semi-finals of the Canadian Open.
The match was disrupted in the second set tie-break when the Rednex novelty classic Cotton Eye Joe began blaring out of the court speakers during play.
Reigning French and US Open champion Swiatek produced an error-strewn display against against the American.
"I felt like I was in control. It feels great and there's no better way to earn it, right?," Pegula said.
"She played some really great tennis at the end of the second set and in the third.