The Championship playoffs kick off this week, with four sides battling it out to earn a spot in the Premier League . Millwall , Southampton , Middlesbrough and Hull City will clash in the end-of-season tournament, with the victor claiming a much-desired spot in the top flight and of course the riches that go with it. Three of the sides have previously been in the Premier League, Southampton the most recent. Saints will be aiming to secure an instant return following their impressive run of form