QPR manager Neil Warnock was quick to praise Millwall after their London rivals battled for a point in a goalless draw at Loftus Road.
Rangers' 100% home record came to an end as the Lions held out for a point thanks to goalkeeper David Forde, who made three fine saves to thwart the hosts.
Warnock's side remain six points clear at the top, however, after their nearest rivals failed to take advantage.
He said: "You've got to give Millwall credit. They defended for their lives. Kenny Jackett gets the maximum out of his team and they needed to be at their maximum, because I thought we were very good.
"Heidar Helguson had a great chance, Clint Hill had a free header and so did Kaspars Gorkss, and if we'd scored then they would have had to have opened up a bit.
"But credit to them, they kept going until the end."