add_action('init','my_router');

/events/my-event/
/reports/my-event/

function my_router() {
    $reqs = explode('/', $_SERVER['REQUEST_URI']);
    if ($reqs[1] == 'events') {
        include 'single-events.php';
        exit();
    }
    if ($reqs[1] == 'reports') {
        include 'single-fotoreports.php';
        exit();
    }
}