Having missed the games against Marseille, Bournemouth and Qarabag, Konate wasn't due to be available for the weekend, but he was present for training late in the week and head coach Slot declared the 26-year-old wanted to help his colleagues.
The Dutchman added: "He was planning to be back for the end of this week and it would have meant he could not play this game, but when he saw the problems we had defensively, he called me early this week and said: ‘I want to be back to help the team against Newcastle’.
"He came back on Wednesday and trained twice with us. Today, not only he scored a goal, but he played a great game and the fans were really appreciative throughout the whole game, but definitely at the end when he scored. His team-mates were just as appreciative when he came in the dressing room after the final whistle.
"Everyone was cheering for Ibou and Florian when they came in after doing TV interviews, but especially for Ibou. This team has shown we are always there for each other in difficult circumstances – that’s what they were for him in the last few days."