Nova (8-2) won his fourth straight start, scattering five hits while issuing one walk and striking out six for the Yankees, who improved in 8-2 in June and pulled into a tie with Tampa Bay for first place in the American League East.
The Braves' Randall Delgado (4-6) absorbed the loss, yielding six walks along with five hits en route to allowing three runs.
Second-place Atlanta fell three games behind National League East leader Washington, which beat Toronto 6-3 Monday.
Moore to attend retreat in to avoid Kutcher's wedding
Yosemite climber falls 30 feet, suffers major injuries