Cardiff City owner Vincent Tan has given his manager Malky Mackay an ultimate, telling him to resign or be sacked.

The two have clashed recently over transfer policy and Brendan Rodgers lashed out the Malaysian businessman today.

But Tan has upped the ante in a message to his manager which appears to make Mackay's position untenable.

The BBC reports that Tan sent an email to Mackay criticizing his signings, results and style of play and cast aspersions over the Scot's management record.