Everton boss Carlo Ancelotti has no doubts about the influence of Dominic Calvert-Lewin to their revival.
Ancelotti's men have beaten Chelsea, Leicester, Arsenal and Sheffield United in their last four Premier League outings, keeping three clean sheets in the process.
The most recent of the 14 goals top-scorer Calvert-Lewin has netted in all competitions for the club this term came just prior to that sequence, in the 1-1 draw at Burnley on December 5.
Ahead of the New Year's Day home clash with West Ham, Ancelotti hailed the 23-year-old England international's contribution.
"It is true that he didn't score in the last (few games) as usual, as he did at the beginning, but it is also true that he was really important," Ancelotti said.
"Against Chelsea (he won) the penalty, against Arsenal he was involved in the first goal that was an own-goal, he had an opportunity against Sheffield United.
"He is still working really hard, so I don't have to ask more."
