Week 4 of the 2015 MLS season saw DC United inflict a first defeat on reigning champions LA Galaxy.
The Black-and-Red landed a 1-0 result at the RFK Stadium courtesy of an injury-time winner from Chris Pontius as Ben Olsen's side got the better of Bruce Arena's outfit who were without star strikers Robbie Keane and Gyasi Zardes.
The victory saw DC move up to second place on the Eastern Conference table as the Galaxy dropped to seventh in the West.
Orlando City grabbed a point on the road by coming from two goals behind to draw 2-2 with Montreal Impact at the Stade Olympique.
Lions ace Kaka assisted Pedro Ribeiro for the first of the visitor's goals in the 29th minute before levelling less than a minute later with a customary cool finish after Ignacio Piatti and Jack McInerney had given the Impact the ascendency.
Kelyn Rowe scored a brace as last season's runners-up New England Revolution defeated San Jose Earthquakes 2-1 at the Gillette Stadium for their first win of the campaign as Sporting Kansas City edged newcomers New York City 1-0 at Yankee Stadium.
Reigning Golden Boot winner Bradley Wright-Phillips was on target as New York Red Bulls beat ten-man Columbus Crew 2-1 while Robert Earnshaw netted a late winner on debut for Vancouver Whitecaps as they beat Portland Timbers 2-1.
Chicago Fire got the better of Philadelphia Union 1-0 thanks to Adailton's first-half winner, Real Salt Lake scored a dramatic late victory over Toronto FC to land a 2-1 result, Houston Dynamo and Colorado Rapids played out a 0-0 draw as did league leaders FC Dallas and Seattle Sounders.
2015 MLS season scores - Week 4
New England Revolution: 2 (Kelyn Rowe 21'/37') San Jose Earthquakes: 1 (Chris Wondolowski (p) 62') Gillette Stadium, Foxborough, Massachusetts - 10,668
Montreal Impact: 2 (Ignacio Piatti (p) 14', Jack McInerney 27') Orlando City: 2 (Pedro Ribeiro 29', Kaka 30') Stade Olympique, Montreal, Quebec - 25,245
DC United: 1 (Chris Pontius 90+3') LA Galaxy: 0 RFK Stadium, Washington, DC - 14,462
New York City: 0 Sporting Kansas City: 1 (Ike Opara 12') Yankee Stadium, New York City, New York - 27,454
Columbus Crew: 1 (Ton Tchani 58', red card: Federico Higuain 83') New York Red Bulls: 2 (Bradley Wright-Phillips (p) 49', Mike Grella 6') Crew Stadium, Columbus, Ohio - 18,333
Vancouver Whitecaps: 2 (Nicolas Mezquida 15', Robert Earnshaw 90') Portland Timbers: 1 (Fanendo Adi 82') BC Place, Vancouver, British Columbia
Houston Dynamo: 0 Colorado Rapids: 0 BBVA Compass Stadium, Houston, Texas
FC Dallas: 0 (red card: Kellyn Acosta 17') Seattle Sounders: 0 Toyota Stadium, Frisco, Texas - 18,300
Chicago Fire: 1 (Adailton 37') Philadelphia Union: 0 (red card: Fred 72') Toyota Park, Bridgeview, Illinois - 12,815
Real Salt Lake: 2 (Luke Mulholland 38', Jordan Allen 89') Toronto FC: 1 (Jackson Goncalves 88') Rio Tinto Stadium, Sandy, Utah
