Following their loss at Leicester City, Xhaka admitted the club's struggles on the road - where eight of their 10 league defeats have come - continues to be a particular concern.
"It is difficult to explain why we don't play like at home and why we don't take the points," he said.
"I said this last week. It is a different game away and at home. You can't play like at home.
"You have to win the duels, run more than the opponents because the fans are in front of them.
"All the teams in the Premier League can play football and they can fight. If you don't take the fight against them it looks like (Sunday)."
Xhaka, however, insisted: "We fight. It's not that we don't fight because if we didn't fight we wouldn't go to play.
"It is difficult to explain. Whenever you lose it is always difficult to find the right words."