UNC is now 14-3 on the year, with the other two losses coming to Duke in a penalty shootout and to Maryland in OT. ODU, which Carolina beat 3-0 in Chapel Hill in September, improved to 11-6 with its 10th win in a row.
"I think anyone who watched that game would say it was a very well-played game by two excellent teams," UNC coach Karen Shelton said. "It was a classic matchup played at a high skill level - just a really good game.
"We congratulate Old Dominion. We had chances in overtime but couldn't score, and they could. I'm disappointed we didn't win, but we did come away with something - we'll learn from this game."
Neither team scored in the first half of play at the L.R. Hill Complex, where UNC beat No. 4 Connecticut 2-1 Saturday in a neutral-site matchup. The shots were tied at 4-4 in the first period, and UNC drew two penalty corners (ODU had none) but was unable to convert on either.
The game was scoreless into the 55th minute of play, when ODU finally got on the board. Caitlin Walsh scored on a penalty corner, one of four that the Lady Monarchs drew in the second half, assisted by Christy Longacre.
It took UNC only 37 seconds to tie the score with an unassisted goal by junior Loren Shealy. Just over a minute later, the Lady Monarchs took the lead again, converting another penalty corner. This time it was Rosario Villagra who scored, again assisted by Longacre.
ODU's gamewinner came 7:40 into overtime, on their third consecutive penalty corner. Danielle Clutter scored the goal, assisted by Emily Harting.
"Now we'll regroup and get ready for Syracuse," Shelton said. "ODU exposed some weaknesses today, and we'll make some changes and get better."
Next up for UNC is the team's final game of the regular season, an Atlantic Coast Conference road contest on Saturday at Syracuse, which is in its first season in the ACC. After that, the Tar Heels look ahead to the ACC Tournament Nov. 7, 8 and 10 at Boston College.
No. 10 OId Dominion 3, No. 2 North Carolina 2, OT
Scoring: ODU - Caitlin Walsy (Christy Longacre), 54:14; UNC - Loren Shealy, 54:51; ODU - Rosario Villagra (Longacre), 56:03; UNC - Charlotte Craddock (Sinead Loughran), 60:33; ODU - Danielle Clutter (Emily Harting), 77:40
Shots: UNC 10 (4/5/1); ODU 14 (4/7/3)
Penalty corners: UNC 5 (2/2/1); ODU 7 (0/4/3)
Goalkeeper saves: UNC 1 (Sassi Ammer, 77:40,