Frank Lampard admits Chelsea were given a harsh Champions League reality check by Bayern Munich and accepts pride may be the only thing at stake during the second leg.
The Blues have a mountain to climb to salvage the last-16 tie after rampant Bundesliga champions Bayern ran out deserved 3-0 winners at Stamford Bridge.
Serge Gnabry's second-half double, followed by Robert Lewandowski's 39th goal of the season, did the damage, while a miserable evening for the hosts was compounded the late dismissal of Marcos Alonso.
Substitute striker Tammy Abraham appeared to pull up injured while warming up, although Lampard said he was not aware of that.
Bayern manager Hans-Dieter Flick was delighted by the emphatic victory and that star man Gnabry – who moved to Bavaria via a short spell with Werder Bremen – was allowed to leave the Gunners in 2016.
"I've known Gnabry quite a long time. I saw how he played at Arsenal and I was very intensive the way I followed his career and also when he played for the national team and you could just tell what he could do," said Flick.
"Playing in Germany he's now just doing fantastically well and with Bayern he's really developing well, he's really capable, he's got very good skills, so looking at it that way I'm very happy he's in Germany with us."
He added: "Of course it was a really good result for us. The team performed exactly as we had planned.
"We were very concentrated, very focused to the way we played, and that's the reason why we could win 3-0."
