Belgium edged ahead against France in the opening match at the Davis Cup Finals in Bologna, as organisers confirmed discussions will be held over the tournament's future format amid the absence of top players from this year's event.
The 86th-ranked Raphael Collignon battled back to upset French world number 35 Corentin Moutet 2-6 7-5 7-5, leaving team-mate Zizou Bergs with a chance to secure victory against Arthur Rinderknech later.
World number one Carlos Alcaraz announced earlier on Tuesday that he had withdrawn from Spain's team because of an injury sustained on Sunday at the ATP Finals.