I believe it was ('Ace') Arthur Ashe in 1968, which year began the 'Open Era'.
The very first tennis champion may never be known, as the game's roots and history have made such information lost to time. Arguably, the first professional tennis champion prior to the advent of the Open Era of tennis is Spencer Gore, 1877, at Wimbledon.
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Before the advent of the open era of tennis competitions in April 1968, only amateurs were allowed to compete in established tournaments, including the four Grand Slams.
Rod Laver is a former Australian tennis champion. He has won most single titles in history (200). He has also won 11 grand slam tournaments and has won all four majors in a single year twice. In 1969 he became the one and only player to achieve this feat in open era. He is by far the most accomplished Aussie tennis champion.
The first male in the Open Era to win 3 or more major titles in a calendar year was Rod Laver. He achieved a Grand Slam, winning all 4 titles in 1969. This was the first complete calendar year of the Open Era.
The first amateur to win a grand slam in tennis was Don Budge. He was an American from California, and won the event in 1938.
there is no attitude era' champion
In Wimbledon "the open era", no englishman has won the title.
Roscoe
Jimmy Connors played tennis. Connors holds the record for most titles in the Open Era with 109, Open Era match wins with 1222. He was a very dominant player during his time, and is now a part time commentator for a majority of the Tennis Grand Slams.
Tennis has come a long way from its inception. From Amateur era it has ventured into open era. Wooden rackets have been replaced with modern composite material equipment. A very different code of clothes is also in vogue now.
Yes, Richard Sears, back in 1881-1887, during the amateur era.