Switzerland’s perfect 4-0-0 record through the opening four UEFA Nations League matches has established them as the overwhelming favorite to claim Group B1 and promotion to League A. The side has scored 11 goals while conceding just one, with comfortable wins over North Macedonia and Scotland plus a 2-1 victory against Slovenia. Strong squad depth, recent World Cup momentum, and consistent results under coach Murat Yakin underpin the market’s 97% implied probability. Two fixtures remain against Slovenia and Scotland; only a combination of heavy defeats and unlikely results elsewhere would realistically allow Slovenia or another side to overtake them on points.