There's more to Rod Laver than two Slams. Actually his first Slam is no major performance. He was an amateur and the best players of the time were pros (Gonzalez, Rosewall, Hoad, etc.). The 1969 Slam is a major performance but his most amazing achievement to me is the 1971 Tennis Champion Classic.
A series of winner-take-all matches (best of 5, ofc) against all top players of the time, he never lost a single one. Lol is this Cyclingnews?
http://tt.tennis-warehouse.com/archive/index.php/t-329647.html
1/2 New York Laver d Rosewall 6-3,6-4,7-5
1/10 Rochester Laver d Newcombe 6-4,6-2,4-6,5-7,6-4
1/13 Boston Laver d Roche 7-5,4-6,3-6,7-5,6-1
1/17 Philadelphia Laver d Emerson 6-2,6-3,7-5
1/21 New York Laver d Ashe 7-5,6-4,7-5
1/23 Detroit Laver d Okker 5-7,5-7,6-2,6-2,6-2
1/28 New York Laver d Ashe 3-6,6-3,6-3,6-4
2/4 Los Angeles Laver d Taylor 6-3,7-5,6-2
2/6 New York Laver d Okker 6-1,6-4,6-3
2/17 New York Laver d Ralston 3-6,6-1,6-4,6-3
2/19 New Haven Laver d Emerson 6-3,5-7,6-3,3-6,6-3
To decide the semifinal line-up outside the Laver-matches, the following matches were played:
Ralston bt. Roche. Ralston bt. Ashe. Ashe bt. Rosewall, Okker bt- Newcombe. Emerson bt. Taylor.
3/18 New York SF Laver d Ralston 6-3,6-4,7-5
New York SF Okker d Emerson 6-4,2-6,4.6,6-3,6-4
3/19 New York F Laver d Okker 7-5,6-2,6-1
This is like a Double GS tournament though on a longer period of time, but a double GS when 1st round is Ken Rosewall, 2nd round is John Newcombe, etc. Amazing!