Indeed, City are ready to stand firm over the England winger, who failed to make Roy Hodgson's Euro 2012 squad.
Johnson looked to have missed out on a place in England's final 23 due to his lack of playing time with City.
The former Middlesbrough winger was involved in 26 games for City in their title winning campaign, but of those just 10 were starts.
Johnson only signed a new long-term deal last November, but he is believed to be disheartened at his lack of regular football.
And there is substantial interest in him with his hometown club Sunderland among a string of Premier League clubs keen on taking him.
However, Johnson's new contract also meant his wages were given a significant rise which puts him out of the reach of most clubs.
Coupled with that is the fact City currently have no intention of letting him leave on loan as they consider him an important part of their first-team squad.
City boss Roberto Mancini is believed to be more than happy to keep him and would therefore only contemplate a sale, and even then only if the deal was a good one for the club.
To sell Johnson City would demand market value, with that likely to be in excess of £15million, which means a deal to take him away from the Etihad this summer looks unlikely.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.