Kolkata: As India and Bangladesh enter unchartered terrain with their debut day-night Test match, ball visibility, so crucial in a cricket contest, remains the vexed question. No less intriguing is speculation over how the pink ball is going to behave, particularly in the light of an SG ball replacing the older make.

On Wednesday, a couple of days before the 'historic' Test begins at the Eden Gardens, both Wriddhiman Saha and Daniel Vettori agreed that the pink ball and the conditions do need some getting used to. Saha reminded that "we have more experience with pink ball cricket than our opponents" thanks to three seasons of day-night Duleep Trophy matches. Ironically, though, the tournament was been back to red-ball contests under daylight this season.