The Mattoon Green Wave jumped out to an early lead and went on to post a 73-51 victory Thursday night at Effingham.
Mattoon led 19-6 after the first period, increased its lead to 33-16 at intermission and took a 54-33 advantage into the final eight minutes.
Effingham had two players in double figures. Cannon Bockhorn scored 12 points and KJ Kellams added 11.
The Hearts dipped to 3-23 overall and 1-6 in the Apollo Conference. They will play at home again Saturday, hosting Mahomet-Seymour in another league contest.