Everton boss Roberto Martinez is confident on-loan Barcelona winger Gerard Deulofeu will live up to his reputation later this season.
The teenager is rated highly in Spain, but is yet to catch fire in England.
"The Premier League is a very different competition. There is an intensity and a young man who arrives needs an adjustment period," Martinez explained Catalunya Radio.
"In January or February he will explode. He is adapting very well and will give us what we expect from him."
