Plano put together a 23-9 run in the first half to break away from Lincoln-Way West and went on to post a 53-40 victory in semifinal play at the Class 3A Lincoln-Way West Regional.
Plano took advantage of several missed free-throw attempts by Coal City and made 5-of-7 free throws of its own over the final 53 seconds of overtime to outduel the host Coalers 55-52 Friday night.
Plano won its first sectional by routing Walther Lutheran 63-10 in the Class 1A Wilmington Sectional on Tuesday. The Reapers advance to the state dual team tournament in Bloomington Saturday.