In a 1v1 duel, if both players randomly select the same battlefield, do they play with the same battlefield or must they redraw until different battlefields are selected?

Ruling: You keep the same battlefields. There is no rule preventing both players from having the same battlefield in a 1v1 duel.

Nuances:

• The only restriction on battlefields is in 2v2 format, where both teammates cannot bring the same battlefield.