Group B1 of the 2026-27 UEFA Nations League features Scotland, Switzerland, Slovenia, and North Macedonia in a balanced four-team league phase that begins later this month. The teams enter with comparable squad depths, recent Nations League and World Cup qualifying results, and FIFA rankings clustered in the mid-20s to low-30s, producing similar implied probabilities near 26-27 percent for each side. Early fixtures pit Slovenia against Scotland and North Macedonia against Switzerland on 26 September, followed by Scotland versus Switzerland and Slovenia versus North Macedonia on 29 September, setting up immediate head-to-head tests that will clarify promotion and relegation paths. No team holds a significant rest, travel, or historical edge within the group, keeping the race for the top spot wide open ahead of the six-match schedule.