i hope this clears up any confusion
head to head you all picked up 5 points, and your head to ehad goal difference shows that porto are top with 1, napoli second with 0 and PSG third with -1.
this table shows the goal head to head goal difference. the red numbers in the table show the goal difference for the home team from each match.[TABLE="width: 558"]
[TR]
[TD="width: 18%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"]porto
[/TD]
[TD="width: 12%"]psg
[/TD]
[TD="width: 18%"]napoli
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"]Home
Total
[/TD]
[/TR]
[TR]
[TD="width: 18%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 18%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"][/TD]
[/TR]
[TR]
[TD="width: 18%"]porto
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"]x
[/TD]
[TD="width: 12%"]
0
[/TD]
[TD="width: 18%"]
0
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"]0[/TD]
[/TR]
[TR]
[TD="width: 18%"]psg
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"]-3
[/TD]
[TD="width: 12%"]
x
[/TD]
[TD="width: 18%"]
2
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"]-1
[/TD]
[/TR]
[TR]
[TD="width: 18%"]napoli
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"]2
[/TD]
[TD="width: 12%"]
0
[/TD]
[TD="width: 18%"]
x
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"]2
[/TD]
[/TR]
[TR]
[TD="width: 18%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 18%"][/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"][/TD]
[/TR]
[TR]
[TD="width: 18%"]Away
Total
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 16%"]1
[/TD]
[TD="width: 12%"]0
[/TD]
[TD="width: 18%"]-2
[/TD]
[TD="width: 12%"][/TD]
[TD="width: 12%"][/TD]
[/TR]
[/TABLE]
taking the data from this table we can form this table: the first column is the team name, second column is the goal difference in that team's favour from teh home matches, the third column is the goal difference in that teams favour from their away matches and the last column is the total goal difference. Please Bear In Mind this only takes into account the head to head matches as they are the only ones that count.
[TABLE="width: 422"]
[TR]
[TD="width: 24%"]porto
[/TD]
[TD="width: 16%"]0
[/TD]
[TD="width: 24%"]1
[/TD]
[TD="width: 21%"][/TD]
[TD="width: 16%"]1
[/TD]
[/TR]
[TR]
[TD="width: 24%"]psg
[/TD]
[TD="width: 16%"]-1
[/TD]
[TD="width: 24%"]0
[/TD]
[TD="width: 21%"][/TD]
[TD="width: 16%"]-1
[/TD]
[/TR]
[TR]
[TD="width: 24%"]napoli
[/TD]
[TD="width: 16%"]2
[/TD]
[TD="width: 24%"]-2
[/TD]
[TD="width: 21%"][/TD]
[TD="width: 16%"]0
[/TD]
[/TR]
[/TABLE]
as you can see Porto top the group with a H2H GD of 1
Napoli come second with a H2H GD of 0
and PSG come third in the group with a H2H GD of -1
unfortunately for wyggie, despite seemingly having the same record if not better then the other 2 sides he came third in the group.