"When my team needs it the most, that's when I want to come up big," Johnson said.
Johnson hit two 3-pointers in the fourth, each tying the score.
Johnson's drive with 14.8 seconds remaining in regulation gave Atlanta an 83-82 lead. He pushed the lead to three with two free throws, but Fernandez hit a fallaway 3 to send it to overtime, connecting over Horford.
The Trail Blazers pushed the ball inside to Oden in the opening minutes and quickly sent Horford to the bench. Horford drew his second with 3:08 remaining in the first quarter and did not return in the first half.
Horford's Florida Gators beat Oden and Ohio State to win the 2007 NCAA championship at the Georgia Dome in Atlanta, adjacent to Philips Arena.
F Travis Outlaw is out indefinitely and was not with the team after suffering a stress fracture in his left foot in Portland's win in Charlotte on Saturday. ... Johnson had his 60th career game with 30 or more points. ... The Hawks are 5-0 at home.
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