Pep Guardiola has warned his Manchester City players that complacency is the biggest threat to their push for domestic and European domination.
Guardiola's unbeaten Premier League leaders visit Chelsea on Saturday sitting two points clear of closest challengers Liverpool.
City are well on course to defend the title they won with 100 points in May and are also through to the last 16 of the Champions League with a game to spare.
They have managed all of that largely without the services of last season's club player of the year Kevin De Bruyne.
City must also go to London without top scorer Sergio Aguero, who has missed the past two matches with an adductor muscle strain.
Guardiola, who says he does not care about the possibility of City going through the entire league season unbeaten, has told his players that maintaining their standards is the key to success.
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"The biggest danger to us is basically to think that it's not necessary to improve," he said.
"I see my team and many things are good but still we can be better.
"I am proud that we have been consistent for most of the past 15 or 16 months, playing every three days.
"That's the most difficult thing to achieve in all sports. It's a big compliment for the players. But I tell them every game that there are many things we can do better, but we could have dropped two points in the final 10 minutes at Watford on Tuesday."
"Maybe they are not playing consistently for 90 minutes but when they play well for 50 to 70 minutes, they are excellent."