Robinson on Lyons injury, Knoester return & Dons departures

Aberdeen head coach Stephen Robinson has been speaking to the media before Sunday's Premiership visit of Rangers.Here are the key lines:Robinson says it is a blow midfielder Brad Lyons will miss three to four weeks after minor knee surgery on his knee, but it "could have been a lot worse".After a long injury lay-off, Mats Knoester is available for Sunday's game, with Robinson saying the defender is "a very good option for us again".A decision on whether Knoester is fit enough to be on the bench