[Private200]

I do not know what might confuse you as it is easy. If you got a variable which registers the death of the player, then it can be easily done. One example is:

PHP Code:

new IsDead[MAX_PLAYERS] = 0;

public OnPlayerConnect(playerid)
{
     IsDead[playerid] = 0;
     return 1;
}

public OnPlayerDeath(playerid, killerid, reason)
{
     IsDead[playerid] = 1;
     return 1;
}

public OnPlayerSpawn(playerid)
{
     if(IsDead[playerid] == 1)
     {
          //Make him observe the duel
     }
     else
     {
          // spawn him so he may fight
     }
     return 1;
} 


And in the function which gets called when the round ends, you should add IsDead[playerid] = 0; so he may be spawned normally the next time he tries to spawn.