assistant referee
Flag-waving match official
An assistant referee is an official in sports like soccer who monitors play from the sidelines, watching for offsides, fouls, and boundary violations the head referee might miss.
Called linesmen until the term was changed to reflect broader duties: The assistant referee raised her flag for offside.
Other sports including basketball and ice hockey use similar supporting officials.
Illegal forward position
- touchlineField's side boundary
- throw-inSideline ball return
- cornerMeeting point of edges
- substitutionExchange of one for another
flag · signaling · positioning · communication · monitoring · timekeeping · restart · advantage
Sideline sports official
- fourth officialSoccer's sideline arbiter
- match officialSports game supervisor
- VARRemote match officiating
- decision-makingProcess of choosing actions
consultation · overruling · confirmation · briefing · debriefing · appointment · assessment · FIFA
Cloth symbol or signal
- pointingDirecting attention somewhere
- indicatingShowing or pointing to
- wavingSweeping hand gesture
- communicationExchanging ideas or information
eye contact · headset · radio · earpiece
Illegal forward position
- foulOffensive or illegal
- handballWall-based striking game
- encroachmentGradual intrusion on territory
- penaltyPunishment for wrongdoing
free kick · yellow card · red card · caution · booking · ejection · dissent · simulation
Freedom from prejudice
- objectivityFreedom from personal bias
- neutralityState of taking sides
- fairnessJust and equal treatment
- accuracyDegree of correctness
consistency · positioning · angle · sightline · concentration · focus · split-second · close call
offside
Illegal forward position
substitution · flag · signaling · positioning · communication · monitoring · timekeeping · restart · advantage · stoppage
linesman
Sideline sports official
- fourth officialSoccer's sideline arbiter
- match officialSports game supervisor
- VARRemote match officiating
decision-making · consultation · overruling · confirmation · briefing · debriefing · appointment · assessment · FIFA · UEFA
flag
Cloth symbol or signal
- pointingDirecting attention somewhere
- indicatingShowing or pointing to
- wavingSweeping hand gesture
communication · eye contact · headset · radio · earpiece
offside
Illegal forward position
- foulOffensive or illegal
- handballWall-based striking game
- encroachmentGradual intrusion on territory
penalty · free kick · yellow card · red card · caution · booking · ejection · dissent · simulation · dive
impartiality
Freedom from prejudice
- objectivityFreedom from personal bias
- neutralityState of taking sides
- fairnessJust and equal treatment
accuracy · consistency · positioning · angle · sightline · concentration · focus · split-second · close call · marginal
- FIFAWorld Cup, World Cup trophy, offside rule, red card, yellow card
- game officialsumpire, judge, official, linesman, match official
- Sports Officialsref, umpire, official, linesman, judge
- rugbyscrum, try, rugby, Rugby World Cup, rugby union
- Football Refereesmatch official, linesman, fourth official, VAR
- hockey officialslinesman, goal judge
assistant refereeplayer
Game participant
competitor · athlete · team captain · captain · coach