Stoke City attacker Xherdan Shaqiri says Raphael Wicky must be "brave" when FC Basel go to Manchester United tonight.
Shaqiri believes the Basel coach needs to gamble if they're to pull off a Champions League upset.
He told Blick: "Old Trafford is one of the best stadiums in the world. Raphael Wicky has to be brave, risk something. Just defending will not be enough.
"But he probably knows that for himself."
Shaqiri added: "If you play quickly and bravely, the defenders get problems. At the back, Manchester is vulnerable."