Joe Hart has rejected suggestions Manchester City need a clearout and said their ageing team can go on and make history by achieving much more together.
The England goalkeeper said City's players still have the hunger and desire to win and implied that manager Manuel Pellegrini can help rally them.
The Premier League champions have lost six of their last nine games and fielded a side with an average age of 29 years, 307 days in Sunday's win over West Ham.
The current group have won two Premier League titles, the FA Cup and the League Cup to become City's most successful side for more than four decades.
But while there has been talk that players such as Yaya Toure, Samir Nasri, Edin Dzeko and Aleksandar Kolarov will be allowed to leave, Hart believes the best days could still be to come.
"There is so much more we can achieve," he said. "We've only just started. City has an amazing history and great people. We've got a lot more history to create. We've been up and down the leagues, now we are winning league titles and pushing for them. There's so much more."
The core of the City side played for former manager Roberto Mancini, who was sacked in 2013 after they failed to defend their Premier League title.
But although City are 12 points behind leaders Chelsea, Hart does not believe there are the same problems in the camp now.
"We've been together a long time," he added. "A couple of years ago we were fairly new but we had a difficult season, came away with nothing. We have grown together as a group, there is a good line of communication between manager, players and staff. We feel like we can get through whatever gets thrown at us."
Manager Pellegrini has admitted City have had a difficult 2015 and goalkeeper Hart agrees, but insists they are not complacent and know how to motivate each other.
"Everyone has bad games -- I've had plenty," he said. "We are not little kids. It's well documented, we've got an experienced squad and we've got people who have been through a lot of ups and downs. The good thing with this team is that it's not down to lack of effort or desire. Sometimes you have bad games -- that's football. We feel quite safe in the dressing room that we've got each others' backs.
"Sometimes people need a gee up, some people need to be criticised. We've been together a long time now and we make sure we know how to get the best out of each other.
"We work hard, we have meetings, we talk about it among ourselves, we talk about it with the manager. We do everything we can to put it right."
City are seven points ahead of fifth-placed Liverpool, who have a game in hand, and Hart said it is unthinkable that they will fail to qualify for the Champions League
They have dropped below Manchester United, who beat them 4-2 at Old Trafford last week, and Hart said that prompted some soul-searching.
"There's been a lot of reflection, a lot of honest conversations," he explained. "It was a tough result to take. This is my club, it was a bad result to lose with the great rivalry we have and the positions in the league."