one-on-one

Adjective

• being a system of play in which an individual defensive player guards an individual offensive player
  • one-on-one defense
    

• directly between two individuals
  • one-on-one instruction
    

Adverb

• (of two persons) in direct encounter
  • preferred to settle the matter one-on-one
    
  • interviewed her person-to-person
    

Related words

• Synonyms: 
  man-to-man , person-to-person