Thomas Tuchel was pleased to see Kai Havertz shine again for Chelsea in a false nine role against Crystal Palace but has challenged the German to show his “absolute quality” on a more consistent basis.
A talented 21-year-old has endured a testing debut campaign in England on the back of a £70 million ($96m) switch from Bayer Leverkusen.
The arrival of fellow countryman Tuchel in the dugout, along with a positional tweak, has started to bring more out of him, with a well-taken goal recorded in a 4-1 win at Selhurst Park.