"We were not at our best. We had chances to score but it was a bad day and we lost the game.
"We did not make good process, we had problems in that sense. We are a team that plays a specific way but it is a bad day, that happens sometimes.
Manchester City had to work hard to see off a spirited Everton side and stay five points behind Premier League leaders Liverpool.
Everton boss Marco Silva: "The first 20 minutes our performance wasn't good enough but after their goal we responded strong.
Norwich City produced a magnificent all-round display to inflict Manchester City's first Premier League defeat since January at an ecstatic Carrow Road.
Norwich City manager Daniel Farke, speaking to BBC Sport: "Of course it is a special day for us and for the club, against one of the best teams in the world and when we have so many injuries.
Sergio Aguero was labelled a "special talent" by Manchester City boss Pep Guardiola after the Argentine hit two goals against Brighton, continuing his record of scoring in all four of his team's Premier League games this season
"Of course we need his goals, everybody knows it.
Manchester City made quick work of Bournemouth as Sergio Aguero scored his 400th career goal. Aguero leads all 2019 Premier League goal scorers, and along with the immense contribution of David Silva, the old guard of Manchester City prove they still have plenty left in the tank.
Manchester City rounded off an outstanding season by crushing Watford at Wembley to clinch a historic domestic treble.
Raheem Sterling and Gabriel Jesus both scored twice as Pep Guardiola's team became the first English men's side to achieve the feat of winning the Premier League, FA Cup and Carabao Cup in the same season.
Vincent Kompany may have scored an absolute wonder strike to win the game against Leicester and send his Manchester City team back to the top of the table, but it wasn't enough to earn him your player of the match.
Manchester City still have to wait before being officially crowned as English Premier League champion this season as Pep Guardiola's men suffered a shocking 3-2 home defeat against their neighbor, Manchester United at Etihad Stadium.