Roger Federer have bageled his apponents 58 times. He also holds the record for most bagels in a season at 18.
I doubt that Sampras has remotely close to the Roger's ridiculous number.
Tier1(goat): Federer; Tier 1.5: Laver, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall; Tier 2.5: McEnroe, Agassi