By Josh O’Brien Arsenal right-back Ben White has admitted the Gunners need to become more streetwise after their Champions League gut punch in Porto. Mikel Arteta’s men are back in European club football’s most prestigious competition after seven years away and impressed during the group stages. However, Arsenal now find themselves 1-0 down to Porto after defeat at the Estadio Dragao in the first leg of their round-of-16 clash, meaning the Gunners are going to have to come from behind to reach the last eight of the Champions League for the first time since 2010. Arteta echoed a similar sentime…
