Meanwhile , Blackburn 's Derrick Williams has been booked for a foul on Olamide Shodipo .
Frustration for Rangers as Sebastian Polter is unable to connect with James Perch 's low cross .
Blackburn 's Derrick Williams has been booked for a foul on Olamide Shodipo .
Frustration for Rangers as Sebastian Polter is unable to connect with James Perch 's low cross .