tables in mobile mode

Please have a look on http://www.tennis-grossraeschen.de/ergebnisse/ergebnisse-der-sommersaison-2016/ with a smartphone in portrait mode. On this page i have a table which is correctly rendered so far. But for some reason i have a horizontal scrolling bar which makes controlling the page a little bit "spongy". Is this cause the table has too much informations and is to wide for a smartphone in portrait mode? I thought every table will be rendered to the maximum width of it's outer div.