The Lobsters won all three sets, part of a 22-14 victory that secured their spot in Friday night's Eastern Conference Finals in Charleston, S.C. They'll play undefeated Washington.
Newport Beach finished a tough World Team Tennis season with a 4-10 record.
Vandeweghe's mother, Tauna, was one of her loudest supporters Thursday. Tauna won Olympic silver medals in swimming (1976) and volleyball (1984). Coco's uncle, Kiki, and grandfather, Ernie, both played in the NBA.
"[I had] family members, friends, and Jan-Michael [Gambill] also had a big group with him," Coco Vandeweghe said. "We made it kind of a Boston crowd even though we were at home in Newport Beach. I live just down the street, and I have a big family. They're loud and noisy, because they grew up in basketball and in arenas. They come out full-force."
The Lobsters' Gambill has family that lives in Tustin. It added up to a large amount of Boston supporters. They saw the Lobsters rally after Newport Beach's Lester Cook defeated Gambill, 5-2, in men's singles in the opening set of the night.
Gambill and Eric Butorac came back to defeat Cook and Travis Rettenmaier by the same 5-2 score in men's doubles. Then Vandeweghe, who is coached by Palisades Tennis Club pro Robert Van't Hof, did her part.
Vandeweghe and Butorac defeated Rettenmaier and Marie-Eve Pelletier, 5-3, in mixed doubles. Then Boston (7-7) poured it on, as Vandeweghe and Mashona Washington defeated Pelletier and Anne Keothavong, 5-1, in women's doubles.
Vandeweghe had the spotlight in the final set, and she defeated Keothavong, 5-1, in women's singles.