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The Holland international has two years to run on his current deal at Eastlands and has established himself as one of the key figures at the club since joining from Hamburg two years ago. The 26-year-old had hoped to sign a contract extension before the new season, with City due to meet cross-city rivals United in the Community Shield on August 7.
De Jong may, however, be forced to wait until after the new campaign begins after revealing discussions had ended. He told the People: "There's no update on my contract because talks have stopped."
He added: "Maybe something will happen again when the season starts, but at the moment it is a little frustrating for me.
"I can't go into details other than to say that I couldn't reach an agreement with the club, so we will have to see what happens in the future.
"I was hoping that it would all be agreed this summer and that hasn't happened. It has frustrated me but I am a patient man and we will have to see what happens."
De Jong's City team-mate Micah Richards has also revealed his frustration at the lack of opportunities he has had under England boss Fabio Capello. The defender has made just one appearance under the Italian, against France in November last year, since he took over the Three Lions three years ago.
"I don't know why I'm not playing for England - but that's something only Fabio Capello can answer," he told the Sunday Mirror.
"Why I haven't been given a chance I can't understand. When I came in against France I thought I did well, yet I was left out again for the next international.
"People might say that I am arrogant, but when I am 100 per cent fit and fully focused then I am as good as anyone around."
Source: PA
Source: PA