Park Summers set up Manikas’ third goal, which came with nine minutes left.
“We’re still trying to evolve,” Cooperstown coach Frank Miosek said.
Cooperstown (2-1, 2-1) visits Mount Markham on Friday.
Unatego 4, Sidney 1
Aryn VanAlstyne finished with a goal and an assist to lead host Unatego to a Midstate Athletic Conference win.
VanAlstyne tied the score at 1 on a low shot from inside the box with 9:17 left in the first half. Her goal, assisted by Tanner Reed, offset a goal by Sidney’s Katie Kirk with 13 minutes left in the first half.
Torri Halaquist scored the go-ahead goal 1:26 into the second half off a corner kick by Cassidy Newman.
Jolene Krom finished with 12 saves for Sidney. Megan Faulkner stopped four shots for the Spartans (2-2, 1-0), who visit Oxford on Thursday.
Delhi 4, Walton 2
Second-half goals by Makayla Ruchar, Melissa Conrad and Adelene Sackett rallied host Delhi to a MAC victory.
Ruchar tied the score at 2, scoring on a left-footed shot that deflected off a Walton defender and into the goal 2 1/2 minutes into the second half.
Conrad scored the go-ahead goal on a header following a direct kick by Casey Steffens. It gave the Bulldogs a 3-2 lead with 27:14 left.
Sackett’s goal came with 15:03 remaining.
Merissa Castillo and Kelsey Smith scored in the first half for Walton. Olivia Wakin scored in the first half for Delhi (3-2, 1-1), which will travel to Bainbridge-Guilford on Thursday.
UV 11, Oxford 0
Taylor Davis had three goals and two assists to lead Unadilla Valley to a MAC rout at home.
Emily Converse and Julia Oglesby contributed two goals apiece for the Storm, who received three saves from goalie Abbie Oglesby in the shutout.
Cooperstown 5, WCV 2
Liz Millea and Maggie Hall scored two goals apiece as host Cooperstown won in the Center State Conference despite being outshot, 28-10.