John Donald Budge (June 13, 1915 – January 26, 2000) was an American tennis player. He is most famous as the first tennis player — male or female — to win all four Grand Slam tournaments in one year and complete the Grand Slam. Budge was the second man to complete the career Grand Slam, after Fred Perry. He won ten majors, of which six were Grand Slam events (consecutively, a men's record) and four Pro Slams, the latter achieved on three different surfaces. Budge is considered to have one of the best backhands in the history of tennis, with most observers rating it better than that of later player Ken Rosewall. Wikipedia
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