In fact, Rosewall could be a slighty favoured in 1970, since both won 1 major but Rosewall also reached a Wimbledon final, while Newcombe didn´t play any other major final.
In 71, Rosewall had two big wins but Newcombe defeated Laver at Philadelphia and , again, Rosewall ( and Smith) at Wimbledon.So, let´s give one year to each one and we will be fair.any year awarded is OK.
kiki, old Newcombe fan, I would throw in that Rosewall beat Newcombe in the 1971 WCT finals.