If sterling last goal counted, how comes Man City would've gone through?

If sterling scored they've would have needed to score more to win? So why did the commentator say he's won it for them? as spurs scored 3 away goals and a home goal that makes it 7 in total for spurs which meant if sterling last goal wasn't offside they would've needed to score 2 more goals to draw? show more If sterling scored they've would have needed to score more to win? So why did the commentator say he's won it for them?

as spurs scored 3 away goals and a home goal that makes it 7 in total for spurs which meant if sterling last goal wasn't offside they would've needed to score 2 more goals to draw?
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