The 23-year-old is out of contract in two years time, meaning there is no immediate urgency to renew his deal, but the fact that talks continue to stall could be a bad sign.
A new four-year deal stretching to 2022 was thought to be on the table for Sterling, but despite his representatives meeting with City twice since the end of the season, they remain some way apart on an improved salary.
In recent months, City have agreed new deals with a host of key players, including Kevin De Bruyne, Fernandinho, David Silva and Nicolas Otamendi, and behind the scenes the club remains relaxed about the current impasse and confident that an understanding can be struck after the World Cup.
Privately, Sterling's team believe he deserves to be remunerated on a scale similar to the clubs' top earners. Under Guardiola he has flourished in a free attacking role, finishing as the Premier League's fifth top scorer and just three league goals behind City top marksman, Sergio Aguero. Sterling, meanwhile, pockets £175,000 per week.
It was hoped that a deal could be agreed before England get their World Cup campaign underway against Tunisia on June 18, but with Sterling flying out to Russian Federation today it now appears that further negotiations will have to wait.