Chelsea head coach Frank Lampard is grateful for the "big boost" his side has received from in-form Hakim Ziyech.
Ziyech scored the opener on Saturday at Burnley as Chelsea cruised to a 3-0 win at Turf Moor that took them up to fourth in the Premier League table.
With the goal, Ziyech became the first Chelsea player since Diego Costa in 2014 to score on his first two starts for the club in all competitions, after he also netted in a midweek Champions League win at Krasnodar.