Havertz had a couple of late opportunities to finish things once and for all but found his compatriot Leno in his way. So we settled for two goals and three very satisfying points indeed.
What’s next?
It’s Liverpool away on Saturday for Thomas Tuchel’s side, that one a 5.30pm kick-off.
Chelsea (4-2-3-1): Mendy; Azpilicueta (c), Christensen, Rudiger; James, Jorginho, Kovacic (Kante 72), Alonso; Mount (Ziyech 82), Lukaku, Havertz (Werner 90)
Unused subs Kepa, Chilwell, Chalobah, Thiago Silva, Zouma, Hudson-Odoi
Scorers Lukaku 15, James 35
Arsenal (4-2-3-1): Leno; Soares, Holding, Mari, Tierney (Tavares 66); Lokonga, Xhaka (c); Pepe, Smith Rowe, Saka (Aubameyang 61); Martinelli (Balogun 79)
Unused subs Ramsdale, Chambers, Kolasinac, Tavares, Maitland-Niles, Elneny, Nelson.
Booked Mari 34, Holding 45, Lokonga 67
Referee Paul Tierney
Crowd 58,729 (tickets sold)