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American midfielder Paul Rabil led the squad onto the field Thursday night. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1137 )

US defender Michael Evans (33) tracked Canada midfielder Cam Flint (18) in the second quarter. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1216 )

United States midfielder Ned Crotty (21) got rid of the ball under pressure in the second half. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1574 )

Players swarmed over a loose ball in the second quarter. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1199 )

Canada goalie Dillon Ward made a save on a shot from United States attack Brendan Mundorf (2) in the first half. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1155 )

United States attack Kevin Leveille (19) put a hit on Canada defenseman Matt Vinc (48) to cause a turnover in the second half. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1635 )

American players Lee Zink (29) and Daniel Burns (4) shadowed Canada midfielder Cam Zink (18) during his run in the second half. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1835 )

United States midfielder Kevin Buchanan (27) fired a shot on net in the first quarter. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1025 )

Swiss players took a selfie in the stands Thursday night. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1013 )

United States kiddie Paul Rabil (99) tried to carry the ball past Canada defender Jason Noble (45) in the second quarter. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1263 )

United States attack Brendan Mundorf (2) fired a shot past Canada defenders Kyle Rubisch (8) and Matt Vinc (48) for a goal in the second quarter. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1461 )

United States midfielder David Lawson (31) knocked Canada midfielder Geoff Snider (25) to the ground in the first half. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1164 )

Canada assistant coach Matt Brown talked to the players during time out late in the fourth quarter. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1791 )

American attack Brendan Mundorf (2) celebrated a goal in the second quarter. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1475 )

Canada goalie Dillon Ward made a save on a shot from United States attack Brendan Mundorf (2) in the first half. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1156 )

United States midfielder Paul Rabil signed autographs for fans following the win. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1239 )

The American side celebrated after the win Thursday night. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1938 )

American midfielder Paul Rabil carried the flag onto the field Thursday night. The United States took on Canada in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1119 )

A fan took a selfie with United States midfielder Paul Rabil after the match. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1299 )

United States midfielder Greg Gurenlian celebrated the win with fans. The United States defeated Canada 10-7 in the opening game of the FIL World Lacrosse Championships Thursday night, July 10, 2014. Photo by Karl Gehring/The Denver Post ( SP10LAXPHOTO_DSC_1173 )