Di Vaio makes impact for Montreal

Di Vaio got his first MLS goal in the 48th minute and there were also strikes from Davy Arnaud and Sanna Nyassi.

Thierry Henry scored his 11th goal of the season before Nyassi secured the win for Montreal in the 74th minute which dented New York's title hopes in the Eastern Conference.

Houston Dynamo closed to within one point of the leader with a 2-0 win over Toronto for a fourth straight victory.

Dynamo moved into second place as a result of the win which came with goals from Calen Carr and Brian Ching.

Jairo Arietta marked his MLS debut with two goals as Columbus Crew defeated Sporting Kansas City 2-1.

The visitor went ahead in the eighth minute through Kei Kamara's header but Arietta, who joined Crew from Costa Rican club Deportivo Saprissa, scored in the 17th and 34th minutes.

Columbus finished the match a man down after Cole Grossman was issued a straight red card in second-half stoppage-time for a foul on Graham Zusi.

San Jose Earthquakes went two points clear in the Western Conference with a 1-1 draw against Chicago Fire.

Earthquakes extended their lead over Real Salt Lake thanks to a late strike from Stephen Lenhart.

Chris Rolfe had given visitor Chicago the lead in the first half before San Jose saw Lenhart equalise late on before the home side's Alan Gordon was sent off in the third minute of added time for a second yellow card.

Mike Magee scored in the 62nd minute as a Los Angeles Galaxy side without Landon Donovan and David Beckham beat FC Dallas 1-0.

The defending MLS champion was without the suspended Donovan and Beckham who has not returned to the United States since taking part in the opening ceremony at the London 2012 Olympic Games.

Osvaldo Alonso scored in the 66th minute as Seattle Sounders won 2-1 to hand Colorado Rapids a sixth straight loss.

Eddie Johnson scored in the first minute but Drew Moor replied two minutes later for the Rapids.

Johnson then had a hand in the winning goal for Alonso.

Bottom side Portland Timbers was a 1-0 loser against Chivas USA which scored the only goal through Danny Califf.