diff --git a/lib/lorchess/round_robin_table.rb b/lib/lorchess/round_robin_table.rb
index d5f737a..34ae4eb 100644
--- a/lib/lorchess/round_robin_table.rb
+++ b/lib/lorchess/round_robin_table.rb
@@ -194,7 +194,7 @@ module LORChess
               @buffer << "      <td class=\"score\">#{@game_scores[round][i][j]}</td>\n"
             end
           else
-            @buffer << "      <td class=\"diagonal\" colspan=\"#{@@rounds.to_s}\"></td>\n"
+            @buffer << "      <td class=\"diagonal\"></td>\n" * @@rounds
           end
         end