It's obvious neither Rafa nor Uncle Toni care much for Sampras, and the feeling appears to be mutual. Sampras hs always acted as a cheerleader for Federer and treated Rafa as some sort of stone in Federer's shoe, as opposed to a legitimate potential GOAT canidate in his own right. Sampras has always had a sort of patronising attitude towards Nadal. Maybe Sampras was miffed that the Nadals never talked much about him when considering GOAT canidates (it was always Laver or Federer or even Borg). Nadal is going down as a greater player than Sampras anyway. Despite having 3 less slams (which he'll get to soon enough), one could make the argument that he's already greater, and a more complete player than Petros ever was.