Chelsea boss Antonio Conte says all players in his team know that he will have to take important decisions before every game.
The Italian was answering questions on why Spain's Cesc Fabregas was not in his starting eleven against West Ham United on Monday.
He confirmed he is happy with the attitude and behaviour of the 29-year-old and that he could start this weekend away at Watford.
"Cesc is Chelsea's player and I'm happy with his attitude and behaviour," he told reporters.
"He must know when you are at a great team like Chelsea I have to take decisions before the game, to choose a starting 11. It can happen that Fabregas isn't in the starting 11 but it can happen to all the players.
"It's important to always see the right attitude because we must fight this season. Now, I took this decision but in the next game we don't know, I could change or not.
"When a coach makes a decision there is always a reason but I prefer to keep it for me. But I repeat I don't see any problem, I'm very happy to have these players and train these players.
"N'Golo is a great player, a great buy. He's important for the team, he has good technique and fantastic stamina. He's able to cover a lot of space and help his team-mates always. We are happy with his performance but I was happy with the performance of all my players."