[1] From Phoenix, Arizona,[2] McKenzie joined the United States Tennis Association’s full-time training team in California at twelve years-old.

[3] McKenzie played in the 2015 US Girls’ singles, where she reached the quarter-final before losing to Fanny Stollar.

[5] McKenzie alleged coach Anibal Aranda touched her vagina after a practice in November 2018 at the USTA's training center in Florida when she was nineteen years-old.

McKenzie has since said that the sexual abuse had negatively affected her confidence, self-esteem and caused anxiety that had a detrimental effect on her tennis career.

[7] In March 2022 McKenzie filed a federal lawsuit against the United States Tennis Association after an investigation by SafeSport found it was "more likely than not" that she had suffered a sexual assault by a coach at a United States Tennis Association training centre.