1Arouca's home defensive consistency (4 clean sheets in 4 matches) versus Nacional's away defensive frailty (8 goals conceded in 4 away games).
2Arouca's home attacking output (8 goals in 4 matches) compared to Nacional's away scoring inefficiency (4 goals in 4 away games).
3Arouca's current form (WWLWDLDW) indicating resilience, versus Nacional's winless streak (DWLLLLLL) suggesting a lack of momentum.
4Arouca's ability to avoid failing to score at home (only 2 instances in 8 matches) versus Nacional's frequent failure to score away (3 instances in 4 games).
5The expected goal difference (2.1-0.9) reflecting Arouca's superior home attack and Nacional's vulnerable away defense.