Usher Postpones Tour Opener in Atlanta Just Hours Before Show

USHER POSTPONES ATL TOUR OPENER!!! Hours Before Hitting Stage

Usher just hit his hometown Atlanta fans with a major announcement -- he's postponed his "Past Present Future" tour opener just hours before Wednesday night's show ... saying he's got to put himself first.

The R&B star dropped a long IG statement Wednesday ... saying after pouring his blood, sweat and tears into his three-decade-long career, he needs to let his body rest up and heal -- that’s why he pulled the plug on this evening's show at State Farm Arena.

Usher promised he’s not ditching his fans, and says tonight's show will be rescheduled -- when fans will get 100% of him.

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For now, Usher’s still hitting up two of his ATL dates this Friday and Saturday ... before he heads to D.C. next week.

Clearly, this is a real bummer for fans with tickets ... but comments under Usher’s post were packed with support, reminding him that health comes first.