Zinedine Zidane's Real Madrid suffered a shock 2-0 Champions League defeat at Wolfsburg in Wednesday's quarter-final, first-leg to leave them on the verge of a European exit. Just five days after ending Barcelona's 39-game unbeaten run with a 2-1 away win in El Clasico, Real were humbled as Wolfsburg ignored their struggling mid-table form in Germany's top flight. Real never recovered as first-half goals from Swiss defender Ricardo Rodriguez and Maximilian Arnold put the hosts 2-0 up at the Volkswagen Arena with 25 minutes gone. "I'm not happy, above all with the first-half. This can happen If you don't play with intensity from the start," said Zidane. "Despite everything I'm proud of the team, we have to think about resting well and think about the return because we have the chance to change this in the return leg."

Real's six-game winning streak was ended as Wolfsburg picked up their first win in four games since beating Gent in the last 16 of the tournament.

To give the result context, Wolfsburg needed a 93rd minute equaliser to seal a 1-1 draw with relegation-threatened Darmstadt on their last home league appearance.

There was no hint they would bother Real when they crashed 3-0 at Bayer Leverkusen last Friday in Germany's top flight.

But having also beaten Manchester United 3-2 at home in the group stages, Wolfsburg now have the upper hand ahead of Tuesday's return leg at the Bernabeu.

But goal-scorer Arnold insists nothing has been decided yet.

"There is no point getting carried away. We have only finished 55 percent of the job," he said after his first Champions League goal.

It was a poor performance from Real's star forwards as Gareth Bale was kept quiet and Cristiano Ronaldo rarely shook of his markers.

France forward Karim Benzema went off on 41 minutes after a knock.

Zidane had made just one change -- Danilo in for Dani Carvajal at right-back -- from the ten-man side which beat Barcelona.

Wolfsburg coach Dieter Hecking gambled by starting inexperienced Brazilian Bruno Henrique on the right wing.

Centre-back Naldo was also rushed back after dislocating his shoulder in February, but both selections were rewarded.

There was little hint of the drama to come as Real needed just 74 seconds to put the ball in the Wolfsburg net.

Ronaldo made a late run and tucked his shot past Diego Benaglio, but the offside flag went up.

The hosts started to find their feet before taking a shock 18th minute lead.