Originally Posted by NatF
Winning 3 majors is winning 3 majors, I don't see the difference. Laver's was actually 4 majors so Rosewall's 'pro slam' doesn't compare.
NatF: winning three pro majors meant you have won a Pro GS, winning three majors nowadays means you don't have won the GS.
Following your logic there would not have been a pro GS apart from 1967...