LONDON, Feb 21 (Reuters) - Two months ago few could have imagined a Premier League clash between Manchester City and Chelsea would have little bearing on the title race yet Sunday's fixture is likely to be eclipsed by top against bottom battles. With 12 games left, champions City are 12 points adrift of leaders Manchester United, who visit bottom side Queens Park Rangers on Saturday (1500 GMT), while third-placed Chelsea are a further four points behind. ... More...