Tournesol (7), at 9-2, caught Yesterdayoncemore (3) at 9-5, in deep stretch and won by a neck in Sunday's $60,000 Portofino Stakes at Gulfstream.
Tournesol won in 1:43.40 on the turf course listed as Good in the race for 3-YO fillies.
Edgar Zayas, the spring/summer meet's leading rider in wins, was on Tournesol for Saffie Joseph Jr., whos lead the meet's trainers in wins.
The victory was the third in five career starts and first stakes victory for Tournesol.
Tournesol is a daughter of Karakontie, who at 30-1 won the 2014 Breeders' Cup Mile at Santa Anita.
Karakontie, a son of Bernstein also is the sire of Sole Volante, who won this year's Sam F. Davis Stakes (Grade 3) at 11/16 miles on dirt at Tampa Bay Downs