Serge Gnabry has warned his Bayern Munich team-mates not to suffer a second-leg collapse like Barcelona did last season.
Bayern will head back to the Allianz Arena with a 3-0 lead over Chelsea after Gnabry scored twice, while Robert Lewandowski got one and set up two at Stamford Bridge.
The goals were Gnabry’s fifth and sixth of the Champions League campaign this season after he scored four during the 7-2 win over Tottenham Hotspur back in October.
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The Blues will also be without the suspended Jorginho and Marcos Alonso for the second leg, but the former Arsenal man has warned his side against taking their foot of the gas.
“Three goals ahead and it gives us a lot of confidence,” he told BT Sports after the match.
“We need to be prepared for the second leg and know we can’t take it seriously enough. It is still open but we have a good advantage.”
Before the German international added on his return to London: “I have got a lot of friends here and they were in the stands. It seems like they are giving me good power. It is also good to come back.
“I think we knew we had to be patient. We had the game under control and had a couple of chances but we didn’t take them. We got our chances and in the end we took them.
“We saw last year with Liverpool beating Barcelona after a 3-0 advantage. We have to be careful and try to win that one as well.”