But after a deadline for that figure elapsed , Fortuna are understood to have had a lower offer rebuffed by Sunderland .
Head coach Friedhelm Funkel says his club is now weighing up whether or not to lodge an improved bid .
But after a deadline for that figure elapsed , Fortuna are understood to have had a lower offer rebuffed by Sunderland , and head coach Friedhelm Funkel says his club is now weighing up whether or not to lodge an improved bid .