goal difference
US /ˈɡoʊl ˌdɪf.ər.əns/
UK /ˈɡoʊl ˌdɪf.ər.əns/

1.
the difference between the number of goals scored and the number conceded by a team in a league, used to rank teams that have the same number of points
:
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Their goal difference of +15 put them ahead of their rivals.
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The team needs to improve its goal difference to secure promotion.