Why have Celtic qualified with +1 goal difference when Man U have +3 and on the same points ?
Answers:
the head to head results is used as the first tie-breaker at the UEFA Champions' League. as both Manchester United & Glasgow Celtic are tied with 3 goals each after both meetings, Glasgow Celtic has the better head to head record coz they scored 2 of the goals at Old Trafford, Manchester on matchday 1.
any goals scored at away ground is consider as double, so Glasgow Celtic is above Manchester United & they have secured a place in the knock-out stage regardless of what happened when Manchester United host SL Benfica on matchday 6 in December 2006.
idk
I Don't know and why have you asked this question many times
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