"For sure, that is not very good for his confidence, but also Robert is a professional who has to learn to deal with that kind of moment. It's experience for him. He has to improve also to deal with that kind of moment during a game at home where the fans, for any reason, are not happy. He has to manage that moment," Maresca told reporters when asked how Sanchez had responded to Monday's error.
"I didn't speak with Robert. I consider that kind of moment part of our job. You have to learn that you have to deal with that. It's already happened in the past with Robert, and he did quite well. He's getting better, but he’s still far, far, far from where I want him to be.
"I'm not thinking about the seasons coming. I'm thinking about this season. For this season? No doubt [Sanchez will keep his place]. But then in the future, we don't know. It is not only about Robert. It is not even about me, you know? I'm focused on this moment, this season. Since we started, Robert is getting better, but he is still far, far, far from where I want him to be."