Houston Rockets star James Harden was in the gym to see the Mustangs take a step closer to the State Tournament.
Manor got nice performances by Quentin Middleton, Jamal Snead and Augustine Arroyo to upset 12th-ranked Fort Bend Hightower, 85-77, and advance to the regional final in Houston.
Manor will play Connally on Saturday afternoon, with the winner headed to San Antonio.
Thorndale had an early lead against Port Aransas, then needed a second half comeback.
The Bulldogs grabbed the lead back in the third quarter, but Port Aransas won the battle in the fourth, with a 42-40 victory.