The visitors give the ball away again in a dangerous area.
Madueke picks it up and drives into the box, before cutting onto his favoured left-foot.
He looks to put it in the far corner before the defender on the line volleys it into the opposite top corner.
Middlesbrough come forward and finally get the ball in the back of the Chelsea net but it is ruled out for offside.
Photo Credit: ChelseaFC/ X