Armenia's Yura Movsisyan scored twice as his side handed Denmark a shock 4-0 home defeat in their World Cup Group B qualifier last night, days after being defeated by Malta at home.

"It's the worst night of my footballing life," Denmark coach Morten Olsen told Denmark's TV2 in an interview as his country was faced with a struggle for World Cup qualification.

"It's incomprehensible that we couldn't perform better, but it's 100 percent my fault.

"There was a lot that went wrong, no-one hit top form," added Olsen, who has coached the national side for almost 13 years. "I don't really want to analyse it. It simply wasn't good enough."

The Danish nightmare started after 27 seconds when Movsisyan fired home following a mistake by defender Simon Kjaer.

Kjaer was again the villain as Armenia doubled their lead in the 19th minute, keeping the Armenians onside as Aras Ozbiliz fired home.

Spartak Moscow striker Movsisyan netted his second on the hour mark and the Danes looked down and out, failing to create and looking vulnerable on the break as their normally slick passing touch deserted them.

With the Danes pouring aimlessly forward in search of a goal, Armenia's Henrikh Mkhitaryan added a late fourth - his goal ironically applauded by the Danish fans.

The heavy home defeat leaves Denmark in fifth place on six points, level with Armenia in fourth.

Italy lead the group on 14 points, with Bulgaria in second on 10 points and the Czech Republic a point further back in third after six of 10 matches.

The group winners in Europe qualify directly for the 2014 finals in Brazil with the second-placed sides going into the playoffs.