It was a brilliantly worked goal by West Ham, with Arnautovic playing a neat give and go with Lanzini at the edge of Chelsea's penalty area.
The striker then worked himself into space before curling around Azpilicueta and into the bottom corner.
Arnautović goal https://t.co/rvpV4nX8gG
— KTBFFH (@pathyeshme) 9 December 2017