The Irish (25-0, 12-0 ACC) are five wins shy of their longest winning streak, set last season. The loss ended a four-game winning streak for the Yellow Jackets (17-9, 7-6).
“We didn’t have an answer for her,” said McGraw (739-258) , who tied former Virginia coach Debbie Ryan (739-324) for 10th in career victories.
Joseph said Notre Dame’s physical play gave the Yellow Jackets trouble.
“They really bodied us and pushed us offline,” she said.
Georgia Tech’s Tyaunna Marshall averaged 24.1 points in her eight previous games and scored at least 20 points in seven of them. She made 8 of 24 shots on Monday and finished with 19 points and 11 rebounds.
“She’s a great player. She is so hard to guard,” McGraw said. “She struggled a little bit in the first half, but we just could not box her out.”
Kaela Davis added 15 points for the Yellow Jackets, and Sydney Wallace had 11.
Joseph, who is from Auburn, about 80 miles from South Bend, and played at Purdue, said her family made it to the game despite a heavy snowstorm.
“It means a lot to me to risk all that to support me and to support the team,” she said.