On proper surfaces - by that I mean no slowed down courts, no balls with reduced pressure etc. And ever player is at their peak.
On clay, Rafa wins. He was made for clay. Due respect to Borg but I don't think he beats Rafa.
On grass + fast HC (USO) - no one else would come close to Fed/Sampras. Nadal/Djok would get destroyed by Pete. And Pete would lose to Fed.
On slow HC (AO), the field is a bit larger, but again I don't think anyone has much of a chance vs Fed.
On clay, Rafa wins. He was made for clay. Due respect to Borg but I don't think he beats Rafa.
On grass + fast HC (USO) - no one else would come close to Fed/Sampras. Nadal/Djok would get destroyed by Pete. And Pete would lose to Fed.
On slow HC (AO), the field is a bit larger, but again I don't think anyone has much of a chance vs Fed.