The USA beat Canada 1-0 in Orlando to start their tournament with a hard-fought victory.
Abby Dahlkemper started for the States, with Janine Beckie in the Canadians’ XI.
Former City forward Carli Lloyd went close to opening the score for the hosts with a header that was tipped on to the crossbar while Beckie went close for Canada.
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Sam Mewis didn’t play but Lavelle, who came on after 64 minutes, ensured City players had a major bearing on the game as she capitalised on a poor clearance to drill home from six yards.
The victory means The Stars and Stripes are unbeaten in 35 games in all competitions.
slashing home a shot from outside the six-yard box after a poor Canada clearance fell right to her feet.
Brazil are next for the US this Sunday.
Scotland kicked off their international break in style, after emphatically beating Cyprus 10-0 away from home in EURO 2022 qualifying.
Weir got her name on the scoresheet 25 minutes in, as she added the Scots' third of the afternoon after she topped off a superb, solo run into the box with an elegant chip over the Cypriot goalkeeper.
Scotland found themselves five goals to the good at the break meaning Weir was replaced in squad rotation, with former City forward, Claire Emslie coming on for the second half in three changes.
Emslie also found the net as the Scots added another five to secure a magnificent 10-0 victory.
Weir and her national team return to action on Tuesday (February 23) against Portugal.