Upsells should not include the current product

templates/single-product/up-sells.php

@@ -21,7 +21,8 @@ $args = array(
 	'no_found_rows' 		=> 1,
 	'posts_per_page' 		=> $posts_per_page,
 	'orderby' 				=> $orderby,
-	'post__in' 				=> $upsells
+	'post__in' 				=> $upsells,
+	'post__not_in'			=> array($product->id)
 );
 
 $products = new WP_Query( $args );
@@ -48,4 +49,4 @@ if ( $products->have_posts() ) : ?>
 
 <?php endif;
 
-wp_reset_postdata();
+wp_reset_postdata();