AO should be on grass
1987 is calling. The AO is fine. It fits in well as a slow hard court, then you have RG on slow clay, Wimbledon on supposedly fast grass (ha) and USO on a fast hard court. It's a good mix, much better than the mix we have at Masters Level. The problem is the idiots running the ATP and Grand Slams slowing down Wimbledon and the USO.