Great expectations abound but more than a few top-flight managers need good starts and will be under the fiercest scrutiny from day oneEvery football manager is under pressure but, for some in the Premier League, the pressure is more acute. The season opens this weekend with its customary brew of hope and expectation among supporters, and perhaps anxiety in certain dugouts given the need to correct last season’s wrongs, justify major expenditure or – as at Leicester City, Watford, Newcastle United and West Ham United – to demonstrate the new man in charge is also the right one.