Leicester made a devastating statement of intent ahead of the Aviva Premiership play-offs by coming from 13 points down to beat current leaders Harlequins 43-33.
In an action-packed first half, Leicester drew first blood through Thomas Waldrom's try, only for Harlequins to race into a 23-10 advantage courtesy of two tries from Ugo Monye and Nick Easter. But Leicester ensured the game remained in the balance at half-time as Steve Mafi went over, leaving them just three points adrift.
While George Lowe's try restored Quins' advantage, Leicester went through the gears in the second half as a try from Alesana Tuilagi and Waldrom's second brought up the bonus point before Toby Flood, who finished with 23 points, rounded off the win with a late penalty.
The victory sees the Tigers leapfrog Saracens back into second place, with a win against Bath in two weeks' time guaranteeing a home semi-final.
However, they could be without England flanker Tom Croft, who went off injured in the first half.