After missed Chelsea’s first six matches of the term due to a knee injury sustained in a pre-season match against Brighton back in August, Ziyech made return to action as substitute in Blues 3-3 draw against Southampton.
The game was one of the consecutive substitute appearances, including matches against bitter rivals Manchester United and Sevilla.
However, since he has been in the starting XI, the technically gifted Morocco winger has produced an outstanding performances, scored two goals and contributed three assists.
Ziyech, 27, managed five attacking-returns from his four start. These include a goal and assist on his first league start against Burnley and his first goal for the club, three days before against Krasnodar.
He contributed two further league assists on the weekend against Sheffield United, as the west London club came from a goal behind to win 4-1. With the victory, Chelsea extended their unbeaten run in all competitions to eight matches.