Speaking to club media, Savio said: "I’m so happy to be joining Manchester City, the Premier League champions and Club World Cup winners. Everyone knows they are the best team in the world right now, so to be here is very exciting for me.
"I'm excited about the chance to work under Pep Guardiola, one of the greatest coaches ever, and someone I know will help me improve even more.
"I had an amazing time in Spain and I’m looking forward to the new challenge of playing in the Premier League and alongside some of the best players in the world.
"I can’t wait to meet the fans and my new team-mates and hopefully be a part of bringing more success to City."