Gabby Agbonlahor reckons Giovanni van Bronckhorst should have unleashed Aaron Ramsey and Kemar Roofe earlier than he did against Frankfurt.
The Rangers duo were subbed on late into extra-time as the showdown headed for penalties.
Roofe nearly had an instant impact as his cut back across goal was met by Ryan Kent, but his effort with two minutes left on the clock was stunningly saved by Kevin Trapp.
