Everton boss Ronald Koeman criticised his team for being "passive" after they were beaten 3-2 at Watford on Saturday.
Everton led early on at Vicarage Road through Romelu Lukaku but found themselves 3-1 down before Lukaku pulled a late goal back.
Koeman told Sky Sports that there were confidence issues with his players, adding: "I think the start was good, we were the dominant team and scored a good goal -- but then the problems started because we didn't do the same and control the game.
"We had some bad mistakes and [there was] not good communication.