Southampton's rich vein of form in the Premier League continued as it beat Burnley 3-1 with two goals from Charlie Austin on Sunday while another promoted side, Middlesbrough, fared just as poorly, losing 1-0 at home to Watford.
With Hull City having crashed 6-1 at Bournemouth on Saturday, the top flight is proving an unforgiving environment for the teams who came up this season with all three now mired at the bottom end of table after posting impressive starts.
Sunday's defeat could have been worse for Championship winner Burnley had goalkeeper Tom Heaton not produced an inspired performance before Austin took his tally to seven goals in six games with a 52nd-minute strike and 66th-minute penalty.