Ronald Koeman revealed he has become "worried" by Everton's performances after their 1-0 defeat at Southampton left them with one win in nine.
Southampton ensured a miserable return to St Mary's for the manager who left them in the summer, outplaying them to such an extent they deserved a wider margin of victory than that provided by Charlie Austin's first-minute goal.
Everton were as flat as Southampton were in Thursday's 1-0 Europa League defeat by Sparta Prague. That they are seventh in the Premier League -- the highest outside of those expected to compete for the title -- leaves them three places above their hosts but a two-point advantage will diminish if they cannot arrest their poor run.