"We were hurt by the Ireland result and the performance," said Giggs.
"The only way to rectify that is to produce a positive performance on Wednesday. We're expected to win and to win well, and we will do that.
"San Marino have become a better team over the years, but still, we should be beating these teams."
"Qualification is not over," said Giggs. "We have San Marino twice, a lot of home games and the Czechs here in June.
"If we can get nine points going into next season then we are still in with a chance."