Dunlap and Schwartz went the distance in their first match, rallying twice and winning tiebreakers against Nadres and Villajuan.
The duo rallied from a 4-1 deficit in the opening set, sending it to a tiebreaker. In the tiebreaker, they trailed again, 4-1, before winning six of the final seven points to claim the first set.
The Tars' twosome trailed, 3-1, in the second set before winning once again in a tiebreaker, 7-5.
"We're always better in the close matches," Schwartz said. "It's like we play better with the match close."
"It's like a nervous energy, plus Chrissy keeps me pumped up," Dunlap said.
The Youngs had their difficulties against Redlands' duo, but were able to avoid going to tiebreakers.
In the first set, The Sea Kings duo took a 4-1 advantage before the Vazquez sisters came back to tie the set at 5-5. The Youngs pulled away again and won the opening set after Claudia Vazquez hit a shot that landed wide of the baseline.
"We really should have closed that match out earlier," Haley Young said after match.
For both local teams, the end came in the next round. Dunlap and Schwartz made a stand in the second set, scoring their final point after eight deuces. The point extended their season one more game before the Thousand Oaks duo -- the No. 2 seeds in the tournament -- closed out the match.
The Young sisters didn't have any better luck against Peninsula's Mahtani and Kitamura, the No. 3 seed in the field. The Youngs ended their season with a 56-3 record.
Both coaches heaped praise on their players.
"These two [Hayley and Miranda Young] had a terrific season," Corona del Mar Coach Brian Ricker said. "They have gotten much, much better from the beginning of the season to the end."