NYCFC made it two wins from as many matches to begin the campaign with a 2-1 victory over the LA Galaxy at Yankee Stadium.
Anton Tinnerholm opened the scoring midway through the first half with a powerful strike that went in off the crossbar. NYCFC went 2-0 up in the 33rd minute as David Villa put away a simple finish for the hosts.
Jonathan dos Santos produced a classy close-range finish on the hour mark for the Galaxy, who had Ashley Cole sent off late.
The result saw NYCFC join the Columbus Crew as the only two teams on six points in the Eastern Conference, while the loss was the Galaxy's first of the season.
Atlanta got its season going with a 3-1 win over D.C. United at Mercedes-Benz Stadium.
Josef Martinez tapped in a Hector Villalba pass to make it 1-0 for Atlanta in the 24th minute.
Miguel Almiron produced a stunning strike from the edge of the area to double the lead before Villalba headed in a third for the hosts.
Darren Mattocks pulled a goal back for the visitors, but Atlanta saw out its first win of the season.