Michaela Gordon, 16, of Saratoga in the San Francisco Bay Area and Jaqueline Cristian of Romania fell to Eleni Christofi of Greece and Anastasia Detiuc of Moldova 6-4, 7-5 in a girls 18 matchup of unseeded teams in the prestigious clay-court tournament.
Unseeded Keenan Mayo of Roseville in the Sacramento region and Trey Hilderbrand of San Antonio lost to third-seeded Sebastian Baez of Argentina and Miguel Fernando Pereira of Chile 6-1, 3-6 [10-5] in the boys 16s.
Mayo and Hilderbrand had ousted the top seeds (Jonas Eriksson Ziverts and Karl Friberg of Sweden) in the second round and the fifth seeds (Juan Ignacio Batalla Diez of Mexico and Sergio Luis Hernandez Ramirez of Colombia) in the quarterfinals.
Mayo trains at the USTA center in Carson in the Los Angeles area.
The only American singles finalist is sixth-seeded Kayla Day of Santa Barbara in the girls 18s.
In Plantation, Fla.
18 singlesMiomir Kecmanovic (8), Serbia, def. Calin Manda, Romania, 6-4, 6-2.
Stefanos Tsitsipas (3), Greece, def. Mate Valkusz (2), Hungary, 6-3, 6-1.
18 doublesYuta Shimizu and Yunosuke Tanaka, Japan, def. Oliver Crawford, Spartanburg, S.C., and Jack Mingjie Lin, Canada, 7-6 (6), 6-3.
Ergi Kirkin, Turkey, and Alexei Popyrin, Australia, def. Youssef Hossam, Egypt, and Alberto Lim (5), Philippines, 6-7 (6), 6-3 [13-11].
16 singlesKarl Friberg (3), Sweden, def. Nicolas Mejia, Colombia, 6-2, 6-3.
Sebastian Baez (9), Argentina, def. Kyrylo Tsygura (16), North Potomac, Md., 6-4, 6-4.
16 doublesSebastian Baez, Argentina, and Miguel Fernando Pereira (3), Chile, def. Trey Hilderbrand, San Antonio, and Keenan Mayo, Roseville, 6-1, 3-6 [10-5].
Nicaise Muamba, Canada, and Brian Shi (2), Jericho, N.Y., def. Andrew Fenty, Washington, D.C., and Tristan McCormick (4), Berwyn, Pa., 7-6 (5), 3-6 [14-12].
18 singlesKayla Day (6), Santa Barbara, def. Anastasia Potapova (13), Russia, 5-7, 6-3, ret.
Bianca Andreescu (9), Canada, def. Dalma Galfi (2), Hungary, 2-6, 6-4, 6-2.
18 doublesEleni Christofi, Greece, and Anastasia Detiuc, Moldova, def. Jaqueline Cristian, Romania, and Michaela Gordon, Saratoga, 6-4, 7-5.
Pranjala Yadlapalli, India, and Tamara Zidansek (5), Slovenia, def. Sofia Kenin, Pembroke Pines, Fla., and Ingrid Neel (4), Rochester, Minn., 6-4, 2-6 [10-7].
16 singlesGabriela Tatarus, Romania, def. Lea Ma, Dix Hills, N.Y., 6-2, 6-1.
Maria Carle (2), Argentina, def. Hannah Lairmore, Mobile, Ala., 6-1, 6-1.
16 doublesAnia Hertel, Poland, and Mihaela Lorena Marculescu (4), Romania, def. Hannah Lairmore, Mobile, Ala., and Alana Wolfberg, Orlando, Fla., 6-7 (4), 7-6 (4) [10-8].
McCartney Kessler, Calhoun, Ga., and Emma Kurtz, Atlanta, def. Emma Decoste, Stuart, Fla., and Ann Li (5), Devon, Pa., 6-2, 6-3.