Central Valley High School's varsity boys tennis team beat Patterson for the second time this season last month.
The Hawks cruised to a 7-2 victory over the Tigers on a windy day in Ceres on March 31.
Second-place Central Valley improved to 7-3 overall and 7-1 in the Western Athletic Conference standings.
Third-place Patterson dropped to 4-3 in WAC play.
The Hawks defeated the Tigers 6-3 on March 5 in Patterson.
"Patterson gave us a pretty tough match last time," Central Valley head coach Mike Rodriguez said. "Our kids stepped up and played pretty well today. They were focused."
The Hawks won five of six singles and two of three doubles matches versus the Tigers.
Edgar Castillo defeated Francisco Legarde 6-4, 7-5 in No. 2 singles play.
Eric Morales defeated Dylan Halland 6-3, 7-5 in No. 3 singles play.
Morales avenged a 7-5, 6-1 loss.
"He just had an off day the last time," Rodriguez said. "Eric's been really good at making adjustments. He volleyed and hit the ball better this time."
Ruben Morales defeated James Johnson 6-0, 6-1 in No. 4 singles play.
Brandyn Weis defeated Chris Carlson 6-0, 6-1 in No. 5 singles play.
Jorge Bustos defeated Michael Cosio 6-4, 3-6, 6-0 in No. 6 singles play.
Nimrit Chahal and Julio Pena defeated Gerardo Ortiz and German Ortiz 6-3, 6-3 in No. 1 doubles play.
Navjot Kanda and Jesus Cuevas defeated Steven Halseth and Steven Harsirmon 6-4, 7-5 in No. 2 doubles play.
Alexis Villa lost 6-0, 6-1 to Julian Ramirez in No. 1 singles play.
Henry Garcia and Roman Ortiz lost 6-4, 6-2 to Antonio Villarreal and Carlos Ortega in No. 3 doubles play.
The Hawks have four matches left on their conference schedule. Central Valley will play Pacheco (April 14), El Capitan (April 16), Ceres High (April 21) and Los Banos (April 23).
The Hawks trail the crosstown-rival Bulldogs (19-0, 9-0) in the WAC standings. "It should be pretty competitive," Rodriguez said.
Central Valley should make the playoff for the second year in a row.
"I'm not surprised," said Rodriguez, whose team made history last season by securing its first-ever postseason berth. "We have a pretty experienced group."