Barca midfielder Xavi admitted Reyes was superb on the night.
And Reyes said: "Today we did not notice the cold or anything else, we're all happy to play and win, we could not ask for more.
"We knew we had to be very good tactically, because Barcelona can produce a goal at any time and we have done this."
He added: "In recent games I've been able to change things round for myself. It's great to feel the fans' support."