"The Hawks coach even issued a warning to his team, but it didn't help.
Drew feared a letdown against the Grizzlies after his team's recently completed 4-1 road trip had them tied for first in the Southeast Division and second in the Eastern Conference.
The letdown came in a big way Thursday night in a 96-77 loss at Philips Arena.
"They are a team that is scrappy," Drew said before the game. "They've got guys that just get after it. Those types of teams in the past have been problems for us."
The Hawks held a seven-point lead early in the first quarter. It was gone before the end of the opening quarter. By halftime, the Hawks trailed by 10, 53-43."