Jennings was already on the map going into the final round of matches in the Championship .
Jennings made Jennings ' ambitions clear on Monday with an unbeaten double century , becoming the first Durham batsman to hit seven centuries in a season .
Jennings was already on the map going into the final round of matches in the Championship , but he made his ambitions clear on Monday with an unbeaten double century , becoming the first Durham batsman to hit seven centuries in a season .