Cesc Fábregas was unable to find any positives from Spain's friendly against Portugal after the world champions crashed to a 4-0 defeat in Lisbon.
Jorge Carlos Martins fired Portugal ahead on the stroke of half-time before second-half goals from Hélder Postiga, the Spain defender Sergio Ramos, who put through his own net, and the substitute Hugo Almeida sent Spain to their heaviest defeat since 1963.
Victory allowed Portugal a measure of revenge for their World Cup exit at the hands of Spain, who beat them 1-0 at the last-16 stage, and earned their coach, Paulo Bento, a third successive win since he replaced Carlos Queiroz in September.
For Spain, it was a second heavy friendly defeat in the space of two months following their 4-1 loss against Argentina. Fábregas, who replaced Xavi at half-time, admitted it was a night to forget.
"We're hurt. It's been a big scoreline but we have to lift ourselves," the Arsenal midfielder told the Spanish television channel TVE . "We wanted to finish the year well but now we have to wait until February.
"It's not been our best game but you also have to know how to lose. The truth is it's a match where we can't take anything positive. They played better than us, they had a lot of desire."
Fábregas, who feels many of the Spain squad are trying to get back to peak fitness after their World Cup victory in South Africa this summer, added: "Now we need to apologise to the fans and continue forward."
Vicente del Bosque, the Spain coach, said: "We couldn't have played any worse than today. We had a very weak second half and I have to recognise that Portugal have been better than us. We have no excuses. I'm very upset because it was an important game and it hasn't been our day.
"We had good intentions but the reality is today we haven't been good either on the pitch or on the bench."