diff --git a/src/wp-admin/includes/ms.php b/src/wp-admin/includes/ms.php
index 10ed2e27692e0..0b856354f57f1 100644
--- a/src/wp-admin/includes/ms.php
+++ b/src/wp-admin/includes/ms.php
@@ -864,8 +864,9 @@ function confirm_delete_users( $users ) {
 	if ( ! is_array( $users ) || empty( $users ) ) {
 		return false;
 	}
+
 	?>
-	<h1><?php esc_html_e( 'Users' ); ?></h1>
+	<h1><?php esc_html_e( 'Delete Users' ); ?></h1>
 
 	<?php if ( 1 === count( $users ) ) : ?>
 		<p><?php _e( 'You have chosen to delete the user from all networks and sites.' ); ?></p>
@@ -878,12 +879,10 @@ function confirm_delete_users( $users ) {
 	<?php
 	wp_nonce_field( 'ms-users-delete' );
 	$site_admins = get_super_admins();
-	$admin_out   = '<option value="' . esc_attr( $current_user->ID ) . '">' . $current_user->user_login . '</option>';
 	?>
 	<table class="form-table" role="presentation">
 	<?php
-	$allusers = (array) $_POST['allusers'];
-	foreach ( $allusers as $user_id ) {
+	foreach ( $users as $user_id ) {
 		if ( '' !== $user_id && '0' !== $user_id ) {
 			$delete_user = get_userdata( $user_id );
 
@@ -906,6 +905,8 @@ function confirm_delete_users( $users ) {
 					)
 				);
 			}
+
+			// TODO: Check if user has content.
 			?>
 			<tr>
 				<th scope="row"><?php echo $delete_user->user_login; ?>
@@ -930,44 +931,41 @@ function confirm_delete_users( $users ) {
 					$blog_users = get_users(
 						array(
 							'blog_id' => $details->userblog_id,
-							'fields'  => array( 'ID', 'user_login' ),
+							'fields'  => array( 'ID' ),
+							'exclude' => $users,
 						)
 					);
 
+					$blog_users = wp_list_pluck( $blog_users, 'ID' );
+
 					if ( is_array( $blog_users ) && ! empty( $blog_users ) ) {
 						$user_site     = "<a href='" . esc_url( get_home_url( $details->userblog_id ) ) . "'>{$details->blogname}</a>";
-						$user_dropdown = '<label for="reassign_user" class="screen-reader-text">' .
-								/* translators: Hidden accessibility text. */
-								__( 'Select a user' ) .
-							'</label>';
-						$user_dropdown .= "<select name='blog[$user_id][$key]' id='reassign_user'>";
-						$user_list      = '';
-
-						foreach ( $blog_users as $user ) {
-							if ( ! in_array( (int) $user->ID, $allusers, true ) ) {
-								$user_list .= "<option value='{$user->ID}'>{$user->user_login}</option>";
-							}
-						}
-
-						if ( '' === $user_list ) {
-							$user_list = $admin_out;
-						}
-
-						$user_dropdown .= $user_list;
-						$user_dropdown .= "</select>\n";
+
 						?>
-						<ul style="list-style:none;">
+						<ul>
 							<li>
 								<?php
 								/* translators: %s: Link to user's site. */
 								printf( __( 'Site: %s' ), $user_site );
 								?>
 							</li>
-							<li><label><input type="radio" id="delete_option0" name="delete[<?php echo $details->userblog_id . '][' . $delete_user->ID; ?>]" value="delete" checked="checked" />
+							<?php // TODO: Fix duplicate IDs ?>
+							<li><label><input type="radio" id="delete_option0" name="delete[<?php echo $details->userblog_id . '][' . $delete_user->ID; ?>]" value="delete" required />
 							<?php _e( 'Delete all content.' ); ?></label></li>
-							<li><label><input type="radio" id="delete_option1" name="delete[<?php echo $details->userblog_id . '][' . $delete_user->ID; ?>]" value="reassign" />
+							<li><label><input type="radio" id="delete_option1" name="delete[<?php echo $details->userblog_id . '][' . $delete_user->ID; ?>]" value="reassign" required />
 							<?php _e( 'Attribute all content to:' ); ?></label>
-							<?php echo $user_dropdown; ?></li>
+							<?php
+							wp_dropdown_users(
+								array(
+									'name'    => "blog[$user_id][$key]",
+									'include' => $blog_users,
+									'show'    => 'display_name_with_login',
+								)
+							);
+							?>
+
+
+						</li>
 						</ul>
 						<?php
 					}
@@ -986,7 +984,7 @@ function confirm_delete_users( $users ) {
 	</table>
 	<?php
 	/** This action is documented in wp-admin/users.php */
-	do_action( 'delete_user_form', $current_user, $allusers );
+	do_action( 'delete_user_form', $current_user, $users );
 
 	if ( 1 === count( $users ) ) :
 		?>
@@ -996,7 +994,7 @@ function confirm_delete_users( $users ) {
 		<?php
 	endif;
 
-	submit_button( __( 'Confirm Deletion' ), 'primary' );
+	submit_button( __( 'Confirm Deletion' ), 'primary', 'submit', false, array( 'id' => 'confirm-users-deletion' ) );
 	?>
 	</form>
 	<?php
diff --git a/src/wp-admin/network/users.php b/src/wp-admin/network/users.php
index 7ddd5f40a662b..a908b06f6a0c7 100644
--- a/src/wp-admin/network/users.php
+++ b/src/wp-admin/network/users.php
@@ -56,8 +56,9 @@
 
 				$doaction     = $_POST['action'];
 				$userfunction = '';
+				$allusers     = (array) $_POST['allusers'];
 
-				foreach ( (array) $_POST['allusers'] as $user_id ) {
+				foreach ( $allusers as $user_id ) {
 					if ( ! empty( $user_id ) ) {
 						switch ( $doaction ) {
 							case 'delete':
@@ -72,7 +73,7 @@
 								require_once ABSPATH . 'wp-admin/admin-header.php';
 
 								echo '<div class="wrap">';
-								confirm_delete_users( $_POST['allusers'] );
+								confirm_delete_users( $allusers );
 								echo '</div>';
 
 								require_once ABSPATH . 'wp-admin/admin-footer.php';