Chelsea boss Thomas Tuchel has explained Hakim Ziyech's omission from his squad to face Burnley at Stamford Bridge on Sunday.
Ziyech became the first signing of Frank Lampard's reign when Chelsea reached an agreement to bring the winger in for €40 million (£35m/$50m) from Ajax in February 2019.
The Moroccan joined up with his new team-mates a few months later after seeing out the season at Johan Cruyff ArenA, but had to bide his time before making his debut.
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The 27-year-old overcame niggling fitness issues before making his first appearance for the Blues off the bench during the 3-3 draw with Southampton on October 7, and went on to earn a regular spot in Lampard's squad.