It ended the Swans' four-month unbeaten League One record and proved a massive boost for the Lions' survival bid.

Jackett told BBC London: "We played very well, were disciplined, and by far and away it was our best performance.

"That's three goals in three games for Lewis Grabban now, goalscoring and performance-wise he looks like he has a lot of ability."

Grabban put Millwall ahead before Jay Simpson added the second. Jason Scotland's penalty halved the deficit.