The Portuguese winger's two second-half goals ended Everton's unbeaten run and secured Chelsea's first Premier League clean sheet in nine months, though the result was overshadowed by a serious head injury to goalkeeper Emiliano Martinez.
Brentford and Liverpool are separated by just one point in the Premier League table ahead of Saturday's 14:00 kick-off at Brentford Community Stadium.
Pep Chavarria is absent despite travelling to the Hill Dickinson Stadium, while Reece James begins rehabilitation after successful knee surgery.
