Only City & Liverpool signed the non-disclosure agreement, not the media. Papers frequently publish pieces under the heading of 'as reported in...' which is their legal get-out clause.
Simon Mullock tweeted how the Liverpool legal team put pressure on them back in 2013.
That backs up my point, if Liverpool are threatening to sue then how can you expect any paper to print it when they themselves have noproof and given the NDA won't ever get it?