South Florida drops to 7-9 (0-3 AAC) with the loss, while Wichita State improves to 8-8 (1-3 AAC) with its first conference win.
Coming off a career-best 20 points on Wednesday, Tchewa tallied a game-high 19 points with 10 rebounds for his sixth career double-double, second in as many games and third in the last four outings.