Nicolas Jackson had prodded the Blues in front in Atlanta but Almirón's coolly-taken effort, at the ground where he made his name in MLS prior to his move to Tyneside, levelled matters in first half stoppage time.
Neither side found a winner after the break, with Nick Pope excelling on his return from injury in front of a big crowd at the impressive arena.
Serena Taylor was there to bring nufc.co.uk this gallery.