, an official
is a person who insures that a match or tournament is conducted according to the International Tennis Federation (ITF)
Rules of Tennis and other competition regulations.
At the highest levels of the sport a team of up to ten officials may be on court at any given time. These officials are broken up in to categories based on their responsibility during the match. Contrastingly, many tennis matches are conducted with no officials present.
The Chair Umpire "is the final authority on all questions of fact during the match." Questions of fact include whether or not a ball was in, the calling of a service let or the calling of a foot-fault.
The Line Umpire "calls all shots relating to the assigned lines." Line umpires work on court as part of a team of between three and nine line umpires. Each line umpire is assigned by the chair umpire to one line or, in the case of a short handed crew, a position in a system. For example, a line umpire on the receiver's side may have to cover the center service line then, following the serve, move to one of the sidelines.
Rod Laver MBE
(born 9 August 1938) is an Australian
player and was the World No. 1
player for seven consecutive years, from 1964 to 1970. He is the only tennis player to have twice won the Grand Slam
(all four major singles titles in the same year) — first as an amateur in 1962 and second as a professional in 1969. He is also the only male player and first player, male or female, to have won the Grand Slam during the open era
. He is the 3rd male player to win all four Grand Slams in his career after Fred Perry
and Don Budge
Laver was ranked as the best professional player in the world during the five-year period he was excluded from the Grand Slam tournaments. Rod Laver is the second and last male player to win each major title twice in his career. Only Roy Emerson and Margaret Court had won all four Grand Slam tournaments twice before Laver in the history of tennis. In 1967 he also won the Professional Grand Slam (only Ken Rosewall did the same in 1963). Laver is universally regarded as one of the greatest tennis players of all time.