The 2015 MLS season began on Friday, with the defending champion LA Galaxy claiming a 2-0 win against a hapless Chicago Fire team at the StubHub Center.

Saturday was highlighted by Jozy Altidore's brace against the Vancouver Whitecaps in his competitive debut for Toronto FC. Four goals were scored in that game. The other five matches combined for just three goals.

Sunday provided some dramatic moments. Ten-man Orlando City SC salvaged a draw against New York City FC in front of over 62,000 fans at the Citrus Bowl in the teams' inaugural MLS match.

Sporting Kansas City and the New York Red Bulls tied, while the Seattle Sounders confidently defeated the New England Revolution in the final two games of opening weekend.

Here are 10 things we learned in the first round of regular-season matches.

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