Defenders Sagna, Fanni, lead Impact past Red Bulls
Both Frenchmen scored their first goals for the Impact (11-14-3). Fanni scored first off a corner in the 30th minute. Sagna followed eight minutes later off a free a kick, directing the ball past goalkeeper Luis Robles. Piatti added his 13th in stoppage time.
The Red Bulls (17-7-4) had a four-game road unbeaten streak snapped.