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Reece James replaced Marcos Alonso at halftime and the teenager has revealed the instruction Chelsea boss Frank Lampard gave him.
According to James, Lampard urged him to liven the game up.
“It was a crazy game!” he said.
“They were hard to break down and we took advantage of them going down to nine men, it was a shame we couldn’t win. Scoring a goal is a bonus.
“The manager told me to come on and liven the boys up, we had chances to win it but from where we were at half time it’s a good result.
“I had some mad night and some great nights, but for everything that it was, it was certainly right up there.
“Chelsea fans know the story of what we have done in the Champions League but I don’t really want to talk about that.
“For a performance like today you need personalities and characters – at 4-1 down it is easy to give it away and give it up.”