Reading have been forced to move their final pre-season friendly against Charlton Athletic to The Valley because of concerns over the condition of the club's newly- laid pitch.The hot, dry weather has affected the growth of the grass at the Select Car Leasing Stadium and with the playing surface unfit, Saturday's match will now be played behind closed doors at Charlton's home ground instead."This is not a decision anyone at the club wanted to make, but it is the right one," Reading co-chief exec