Serge Gnabry scored four goals and Robert Lewandowski struck twice as a clinical Bayern Munich thrashed Tottenham Hotspur 7-2 away to seize control of Champions League B Group on Tuesday.

The evening had begun well for Tottenham with Son Heung-min scoring in the 12th minute but Joshua Kimmich's superb effort levelled things up in a rip-roaring start.

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Robert Lewandowski's 55th Champions League goal gave the visitors the lead on the stroke of halftime and Gnabry piled on the misery for the hosts with a sizzling solo effort in the 53rd minute before slotting in his second shortly afterwards.

Harry Kane's penalty restored some hope for Tottenham on the hour but Bayern were not finished and former Arsenal winger Gnabry completed his hat-trick in the 83rd minute.

The suffering was not over for last year's runners-up though as Lewandowski and Gnabry struck in the 87th and 88th minutes.

"We are disappointed. Every single touch from Bayern was clinical," Tottenham manager Mauricio Pochettino told BT Sport after the game. "They scored with every touch. It is tough to accept. You have to move on.

"This type of situation you have to face. It is tough and you need to be strong and keep going. Stay together, help each other and be all together. When you receive this type of result it is important to bounce back and believe in yourself. It is the only way to recover."

The loss was Tottenham's largest defeat in Champions League history, and was the first time they conceded seven goals at home in any major competition.

Bayern are top of Group B with six points from two games with Tottenham on one.