“We've got to remember we won't play against teams like that every week in the SPL”
Peter HoustonDundee United manager
"We didn't really believe in ourselves and we were very naive at times," Houston told BBC Scotland.
"We stood off them, we gave them too much respect and when we got the ball, we didn't use it well enough."
United fell behind in the opening three minutes and were three down at the break.
A late double by Aleksandr Sapeta added to those first-half goals by Igor Semshov, Aleksandr Kokorin and Artur Yusupov.
"Defensively we were very poor," added Houston. "We missed the influence of Sean Dillon's experience.
"We're a very, very young side and it showed against an experienced team that were full of quality, full of pace with good technical ability.
"The biggest disappointment was the first half. I thought we worked very, very hard in the second half and put up a showing up until the last seven minutes when they scored two late goals but the first half killed us.
"You've got a striker playing for them [Kevin Kuranyi], a German international, who earns more than what our turnover is. We have to put things into perspective but it still doesn't take away the disappointment.
"We can pass the ball better, we can defend much, much better than that and there was a fear factor which we shouldn't have had.
"We'll learn from this and take it into our SPL [campaign] and what we've got to remember is we won't play against teams like that every single week in the SPL."
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