Manchester United manager, David Moyes, was left frustrated by his side’s ‘schoolboy’ defending as they almost immediately lost their lead over Bayern Munich in the Champions League quarter-final on Wednesday.

Patrice Evra scored a stunning opener for United, but the European champions levelled the score-line through Mario Mandzukic just 22 seconds after the re-start.

“If you're a schoolboy you're told not to concede straight away – and we did,” Moyes said.

“We needed to give ourselves five or ten minutes but they went up and scored. We have got enough experience on the pitch where we should have done it (protected the lead)."

The United-goal looked like a wake-up call for the Bavarians, who went on to score two more through Thomas Muller and Arjen Robben, but Moyes was still pleased with his side's efforts.

“I am really pleased with the performance, but a couple of small errors cost us in the end,” Moyes continued.“

(Bayern) are a really good side, they showed it. I thought we did what we had to do, made it difficult for them.

“Tactically we tried to stifle them, for long periods we did that. If you lose a goal straight after you score, it makes it difficult.”

The defeat means that United won’t be playing in the Champions League next year - the first time after 18 consecutive seasons - but David Moyes hopes the Red Devils' absence will only last one year.

 “(Next season) we've not got Champions League football – but we are not far away. Hopefully it will only be for one year. We are going to rebuild and we are focused to get the team back in the competition,” he added.

“There is no shame going out to Bayern, they are a good side. We played really well and showed the qualities we have got.”

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