Manchester City manager Pep Guardiola insisted he still has no regrets about letting England goalkeeper Joe Hart leave on loan, despite dropping replacement Claudio Bravo for Wednesday's 4-0 win at West Ham.
Argentinian keeper Willy Caballero played in the Chilean's stead.
"He was today," said Guardiola asked if Caballero was now his first-choice selection. "Today I will sleep well. It's not an easy decision. But I have 22, 23 guys and all of them deserve to play. It's a tough decision every single game."
On Hart, Guardiola said: "I'm a guy who has to take decisions and I make a lot of mistakes. Sometimes I make good decisions. But I have to take those decisions."
Guardiola's other selection surprise was keeping leading scorer Sergio Aguero on the bench in favour of 19-year-old Brazilian Gabriel Jesus, who was making his first Premier League start and scored City's third goal.
"These three guys are the future for this club," Guardiola said of Jesus, Raheem Sterling and Leroy Sane, who played in an attacking trio.
"The average age is 20 years old. You cannot see strikers as young as those in big European clubs at the moment, so that is good for the future. We're delighted Gabriel arrived already for the team. He's showing us his potential and his level."
Guardiola said Aguero and Gabriel will play together: "Gabriel can play on the left side. Sergio, for us, remains such an important player for us. We cannot achieve our goals without his contribution."
Chelsea manager Antonio Conte was sat in the London Stadium stands to watch a highly impressive performance from City, but Guardiola said his players, 10 points behind the leaders, have little hope of challenging for the title.
"Only Chelsea can lose the Premier League," he said. "It's a mistake to think about Chelsea when you are 10 points behind. You have to think about winning games. To qualify for the Champions League and fight until the end, you have to make a good run of victories, otherwise it will be impossible.
"Look at how many they've lost in the last 16. They're not going to lose four or five in the games they have left. But anything can happen in football."