Carlo Ancelotti said Kylian Mbappé is suffering from "a lack of confidence" after the forward missed a penalty in Real Madrid's 2-0 Champions League defeat to Liverpool on Wednesday.

Mbappé had the chance to level the game at 1-1 in the 61st minute -- after Alexis Mac Allister had put Liverpool ahead at Anfield -- but his spot kick was saved by Caoimhín Kelleher.

Mohamed Salah also missed a penalty, before Cody Gakpo doubled the home side's lead with a header to put Liverpool top of the Champions League table and leave Madrid struggling in 24th place.

"It happens a lot with forwards; there are times when it's hard for them to score," Ancelotti said in his postmatch news conference. "There's a cure, and it's patience. It's a difficult moment for him, above all today, with the missed penalty. Everyone has to support him.

"It could be a lack of confidence. Sometimes, when you have a moment when things aren't going well, the idea is to play simply, and you can complicate things a bit. He's scored a lot of penalties. Sometimes you can miss one.