SAMI MOKBEL: Arsenal tasted a crash course in winning at all costs against Porto. If Mikel Arteta's young side are to go deep in the Champions League they'll need to learn the dark arts of European knockout football fast
SAMI MOKBEL AT ESTADIO DO DRAGAO: The instant pain of an injury time loss can be hard to shake off. Arsenal don't have that luxury - they welcome Newcastle to the Emirates on Sunday.
