Hi @calanthis99
If you already have a link, then I will assume that you already have a loop to show the 2 latest performance posts.
All you need to do is get the selected post, then load it’s permalink. You can do this like so:
$selected = get_field('relationship_field_name');
$selected = array_pop($selected);
$permalink = get_permalink($selected->ID);
Thanks
E