Man City are now just 11/2 to win all four trophies this season after their demolition job on Schalke in the Champions League.
Pep Guardiola's side have already won the Carabao Cup, and are favourites to win the Premier League, Champions League and FA Cup, and they sent out a huge warning to the rest of Europe after hammering Schalke 7-0 at the Etihad and 10-2 on aggregate.
City stormed into the Champions League quarter-finals as a result, while they still hold a one-point lead over Liverpool in the Premier League and face Swansea in the FA Cup quarter-finals at the weekend.
Guardiola had recently described City as "teenagers" in Champions League terms on the eve of the match but their convincing victory underlined why the Premier League champions are among the competition favourites.
Guardiola said: "When I said we are a teenage team, I didn't say we are not going to fight. We are going to try. It is so nice to be in the quarter-finals for the third time in our history.
On the game against Schalke, Guardiola added: "We were solid, we didn't concede chances and I think in the last 15 minutes of the first half and the second half we were incredibly good.
"We were quick, dynamic and the transitions were good. We scored seven goals.
"I know Schalke are having a tough period - the confidence must not be on top - but even with that you have to do your job and we did it."
Man City multiple trophies
- 6/5 Premier League & FA Cup
- 11/4 Premier League & Champions League
- 4/1 FA Cup & Champions League
- 11/2 Premier League, FA Cup & Champions League
Leroy Sane, who scored a stunning equaliser as City came from behind to win the first leg in Gelsenkirchen, tormented his old side but Guardiola insisted he still expected more from the German winger.
Asked if Sane was at his best, Guardiola said: "No. After the first goal, yes. Before, no. He was not aggressive enough in the first 20 minutes.
"I know it is tough for Leroy, he doesn't play every game, but after 20 minutes he was then outstanding for the goal and the assists.
"He is a player we know has incredible qualities. It is difficult to find around the world a player with the qualities he has."
Schalke's humiliating loss could spell the end for their under-fire manager Domenico Tedesco.
"I'm extremely disappointed," said Tedesco. "We fell apart. There was a lack of tension and it was the worst we've had here since I was coach."