Cover timing when forced to re-roll defense by the attacker

[Mc1gamer]

What step is cover applied? I have a situation where Green Goblin forces a reroll to the defender's rolls at 9b.i but can he force a re-roll of cover (if it's the only defensive success rolled, since he could force a reroll of any others otherwise)? It appears cover is applied by the defender on step 9.a.ii

 

Thanks!

[Negoldar]

You are correct. Cover is applied during 9aii so it can be rerolled by Green Goblin in 9bi.