Dreher whipped city rival Keenan 77-64 in Saturday's final game at the Chick-fil-A Classic, earning the 11-1 Blue Devils a shot at nationally ranked Christ School when action resumes Monday.
"We got what we wanted - a chance to challenge ourselves against a great team," Dreher coach Jon Richards said.
"We played well tonight, but we had some defensive lapses that led to easy baskets, and we can't afford to do that and hope to compete against a team like Christ School."
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Chris Brown and Quayshun Hawkins had the big numbers for the Blue Devils. Brown posted a game-high 22 points, while Hawkins had a double-double (14 points, 13 rebounds). James Whitehead and Derrick Halback added 13 and 11 points, respectively.
Kenny Reed had 16 points for the Raiders, who fell to 4-4.
Both the Blue Devils and Raiders converted more than half of their field goal attempts, but Keenan's dismal 5-for-20 showing at the free-throw line was a factor.