CENTREVILLE -- Third-seeded South River (15-9) got 28 points each from Corey Davis and Jason Dine, but fell short to a taller and deeper Cambridge South-Dorchester team, 87-80, in a Class 2A East region playoff game at Queen Anne's High School.
Cambridge (21-2) will face Dunbar in tomorrow's 7 p.m. championship, also at Queen Anne's.
Hanee Camper, a junior who is being recruited by several Division I colleges, led the Vikings with 27 points.
The Vikings took advantage of their size and strength to build a 22-point lead in the fourth quarter, only to see South River rally.
The Seahawks were done in by an 18-8 Vikings run early in the third quarter that sealed their fate.
"We played them close in the first half," said Davis.
"But their size took over in the second half, and we didn't match up very well."
The teams were tied at 36 with 3:25 left in the first half, but the Vikings went on a 7-4 run to take a 43-40 lead at the half.
Both teams set a torrid pace in the first half, and Cambridge continued it early in the second half.
The Vikings took advantage of nine points by Tyron Anderson and seven by Camper to go on the 18-8 run, taking the score to 61-48 with 2:41 left in the third quarter.
"We always tell our kids that the first five minutes of the second half are the most important part of the game," said South River coach Kenny Dunn. "They turned it up a notch, and we didn't."
The Vikings, who have lost both of their games this year by one point, continued to build the lead, increasing it to 22 at 76-54, with 5:02 left.
But the Seahawks never quit, using 11 points by Davis to go on a 26-13 run to end the game and shave the margin to seven.
"We didn't want to trade baskets with them all night," said Dunn.
"We wanted to come out in the second half and play defense, but we didn't get it done for whatever reason."
Davis, who fouled out with 20 seconds remaining, received a nice ovation from the crowd, and a hug from Dunn as he left the game. Davis finished his career at South River with more than 1,300 points.
"I'm really sad to see him go," said Dunn. "He's a great kid, and a good person. I'd be proud to call him my son."
Cambridge coach Grayson Hurley was equally complimentary of Davis.
"We thought he was tired in the second half, but he never quit. We gave him all we had, and he kept coming back. That's the mark of a great player."
* Lake Clifton 90, Southwestern 80: Shawnta Rogers scored 38 points and Ronald Byrd added 23, leading top-seed and No. 1 Lake Clifton (20-1) past visiting and No. 13 Southwestern (14-9), in a state 4A North region semifinal game.
The Lakers will meet No. 9 Southern-B tomorrow afternoon at 3:30 for the region championship.
Reginald Johnson led Southwestern with 19 points.
* Dunbar 118, Stephen Decatur 63: Marvis Thornton scored 25 points and had five rebounds, Tommy Polley had 24 points and nine rebounds and Jeryl Singleterry had 14 points and nine assists as No. 2 Dunbar won in a Class 2A East region semifinal at Queen Anne's County High.