Add one to many in form - Backpack laravel

I'm using Backpack for Laravel to provide the backend area of my laravel website.

I'm having the following tables in my database structure:

This is to add sets to a match, and add matches to a tournament.

These are my Models:

Tournament Model:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Backpack\CRUD\CrudTrait;

class Tournament extends Model
{
    use CrudTrait;

     /*
    |--------------------------------------------------------------------------
    | GLOBAL VARIABLES
    |--------------------------------------------------------------------------
    */

    protected $fillable = ['from', 'to', 'type', 'location', 'place'];

    /*
    |--------------------------------------------------------------------------
    | RELATIONS
    |--------------------------------------------------------------------------
    */

    public function matches()
    {
        return $this->hasMany('App\Models\Match');
    }
}

Match Model:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Backpack\CRUD\CrudTrait;

class Match extends Model
{
    use CrudTrait;

     /*
    |--------------------------------------------------------------------------
    | GLOBAL VARIABLES
    |--------------------------------------------------------------------------
    */

    protected $table = 'matches';

    protected $fillable = ['opponent'];

    /*
    |--------------------------------------------------------------------------
    | RELATIONS
    |--------------------------------------------------------------------------
    */

    public function sets()
    {
        return $this->hasMany('App\Models\Set');
    }
}

Set Model:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Backpack\CRUD\CrudTrait;

class Set extends Model
{
    use CrudTrait;

     /*
    |--------------------------------------------------------------------------
    | GLOBAL VARIABLES
    |--------------------------------------------------------------------------
    */

    protected $fillable = ['self', 'opponent', 'index'];

    public function match()
    {
        return $this->belongsTo('App\Models\Match');
    }
}

Now I would like to have the following when I create a Tournament in backend:

I can already set from, to, type, location and place. But now I would like the possibility to add a match and add sets to that match. This all on one page.

But I'm a bit stuck on how to do this. Can someone help me on my way?

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