In some examples, a system can include a processing resource and a memory resource. The memory resource can store machine readable instructions to cause the processing resource to: (1) collect feedback from a physical (PHY)-layer of a client at a plurality of access points, before the client is associated with any one of the plurality of access points and (2) select an access point using a client channel correlation value calculated from the PHY-layer feedback, wherein the selected access point serves the client and a client group concurrently using precoding.