South Western is headed to the PIAA Class AAA State Boys' Team Tennis Tournament.
York Suburban, meanwhile, has seen its team season come to a close.
The third-seeded Mustangs earned a state berth with a 3-2 triumph over fourth-seeded Hershey in the District 3-AAA third-place match.
Suburban, meanwhile, fell one win short of a state bid with a 3-1 loss to ELCO in the District 3-AA third-place match.
South Western swept the doubles matches, but needed three-set comeback victories in each of them. Ben Harrison and Shane O'Reilly won at No. 1 doubles, 4-6, 6-1, 6-2. Patrick Kane and Camerson Nathanson took No. 2 doubles, 3-6, 6-2, 6-4. South Western got its other point at No. 3 singles from Joe Harrison in straight sets, 6-3, 6-1.
The Mustangs will now face District 1-AAA champion Lower Merion in a first-round state match on Tuesday.
Ben Strine picked up the only point for Suburban at No. 3 singles with a 6-2, 4-6, 6-1 win.