Umm Salal also have four points and same goal difference (+1), but Al Duhail occupy the top spot having scored more number of goals (three as against Umm Salal's one).
And UEFA have opted to decide the groups by "head to head; goal difference; higher number of goals scored between the teams; higher number of goals scored away from home; goal difference."
Even AFC Bournemouth and Brighton and Hove Albion, who still find themselves in the relegation mix, have a goal difference of -12 and -13 respectively.
Nevertheless, a 2-1 victory ensured Spain remain top of the group on goal difference, although Italy made inroads on that with a 5-0 win over Liechtenstein.