A brace from Haji Wright put Frank Lampard's side in command before late goals from Ellis Simms and Kaine Kesler-Hayden sealed the points at the Den.

The result lifts Coventry up to second in the Championship table, two points behind leaders Middlesbrough, as the Sky Blues stretched their unbeaten run in the league to eight matches.

The visitors went close early on as Victor Torp's effort on the stretch deflected onto the post.

However, Coventry broke the deadlock on 29 minutes when Brandon Thomas-Asante robbed Tristan Crama of possession and took the ball past goalkeeper Steven Benda.

The forward then drilled a low ball across the box into the path of Wright who finished into an empty net from close range.

And Wright doubled Coventry's lead after the break on 66 minutes when he sent a bullet header past Benda from Milan van Ewijk's cross from the right.

The visitors sealed the points on 81 minutes when substitute Simms nodded in from virtually on the goalline after Bobby Thomas's initial header from a free-kick hit the crossbar.

Millwall almost scored a consolation goal soon after only for Carl Rushworth to superbly tip Camiel Neghli's volley onto the post.

And Rushworth then denied Will Smallbone from close range before diving on the loose ball to preserve City's clean sheet.

The Sky Blues added some gloss to the scoreline two minutes from time when Kesler-Hayden exchanged passes with van Ewijk and saw his effort deflect into the net.

Coventry are next in action against Sheffield Wednesday on Saturday, October 4 with kick-off at 12.30pm at Hillsborough.