How can I make this JS repetitive code shorter

I just wrote this piece of code that does the thing it’s supposed to do, although it’s really messy and pretty repetitive and I’m wondering how can I make it much shorter and concise.

if(id==1 && player == "playerOne"){
      Object.assign(playerOne, fighters[0])
    }else if(id==1 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[0])
    }
    if(id==2 && player == "playerOne"){
      Object.assign(playerOne, fighters[1])
    }else if(id==2 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[1])
    }
    if(id==3 && player == "playerOne"){
      Object.assign(playerOne, fighters[2])
    }else if(id==3 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[2])
    }
    if(id==4 && player == "playerOne"){
      Object.assign(playerOne, fighters[3])
    }else if(id==4 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[3])
    }
    if(id==5 && player == "playerOne"){
      Object.assign(playerOne, fighters[4])
    }else if(id==5 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[4])
    }
    if(id==6 && player == "playerOne"){
      Object.assign(playerOne, fighters[5])
    }else if(id==6 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[5])
    }
    if(id==7 && player == "playerOne"){
      Object.assign(playerOne, fighters[6])
    }else if(id==7 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[6])
    }
    if(id==8 && player == "playerOne"){
      Object.assign(playerOne, fighters[7])
    }else if(id==8 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[7])
    }
    if(id==9 && player == "playerOne"){
      Object.assign(playerOne, fighters[8])
    }else if(id==9 && player =="playerTwo"){
      Object.assign(playerTwo, fighters[8])
    }

Thank you in advance!

>Solution :

Assuming

a) there are no more than two players

b) you don’t care that this code handles id < 1 and id > 9

It looks to me like you could reduce this to a single line.

Object.assign(player == "playerOne" ? playerOne : playerTwo, fighters[id - 1])