The call came from a hotel in Riviera Beach, Florida, following which the 34-year-old was transported to a nearby hospital, the TMZ reported.
Her father told TMZ that she was “recovering well".
The US teen prodigy became a favorite of Melbourne when she won two Australian Open titles in succession in 2001 and 2002, beating Martina Hingis in both finals, The Herald Sun reports.
She also won the 2001 French Open along with the Women"s singles gold medal at the 1992 Olympics.
After turning professional at the age of 13, Capriati won 14 career titles, including three Grand Slams.
Struggling with the pressures of the professional tour, Capriati took a break from competitive tennis in late 1993 before returning with great success.
She was arrested for marijuana possession in May 1994.