Roving Umpire. A roving umpire is an official other than the referee or deputy referee who exercises jurisdiction over one or more courts. Roving umpires are responsible for setting up the courts, maintaining proper warm-up and rest-period times, resolving scoring disputes, controlling spectators and enforcing the rules of tennis.
Chair Umpire. A chair umpire is the official responsible for conducting one match in accordance with the ITF Rules of Tennis and USTA Regulations.
Line Umpire. A line umpire is an official responsible for calling all shots directed to the lines assigned to the official.
Chief Umpire. A chief umpire is an official responsible for hiring the officials. In many tournaments, the referee will delegate to the chief umpire the responsibility for assigning, replacing and reassigning officials.
Referee. The referee is generally responsible for supervising all aspects of play and assuring that the competition is fair and played under the ITF Rules of Tennis and USTA Regulations.