Thomas Tuchel saw positives and negatives in Kalidou Koulibaly's home debut after the defender scored in Chelsea's 2-2 draw with Tottenham on Sunday.
The Senegal international, who arrived from Napoli for £34million in July, netted the opening goal with a ferocious volley to spark jubilant scenes at Stamford Bridge. Pierre Emile-Hojbjerg equalised for the visitors before Reece James gave the Blues the lead for the second time.
The Blues looked to be cruising to victory, but, in additional time, Harry Kane nodded home an Ivan Perisic corner to snatch a point. The second equaliser was a controversial one due to an incident involving Tottenham defender Cristian Romero seconds earlier.