Leicester returned to the top of Pool 4 after producing an efficient showing to overcome Ulster 20-9, denying their visitors even a point at Welford Road.
In a closely-fought encounter, Matt Smith scored a crucial second-half try that sealed the points and also a first home win this season for Leicester.
He grounded with twelve minutes remaining after latching onto an fine grubber kick from England fly-half Toby Flood, who kicked five penalties.
Flood and Ian Humphreys were the only players to trouble the scoreboard in the first-half when they hit three penalties apiece in an enthralling battle.
But it was the home side who turned on the gas in the second stanza, with Flood getting the ball rolling with another solid three points before Humphreys missed a relatively simple effort.
The game continued to be ruled by impressive defences and it was Leicester's which time and time again stood firm before Smith's opportunistic moment preceded Flood's fifth penalty shot that denied the Ulstermen even a losing bonus-point.
Victory means that Leicester Tigers are now unbeaten on home soil in the Heineken Cup since their 2006/7 campaign, a record that stretches to a remarkable seventeen matches.
Pen: Flood 5
Pen: Humphreys 3
Leicester: 15 Geordan Murphy, 14 Horacio Agulla, 13 Matt Smith, 12 Andy Forsyth, 11 Alesana Tuilagi, 10 Toby Flood, 9 Sam Harrison, 8 Thomas Waldrom, 7 Jules Salvi, 6 Tom Croft, 5 Geoff Parling, 4 Louis Deacon, 3 Dan Cole, 2 George Chuter, 1 Marcos Ayerza.
Replacements: 16 Rob Hawkins, 17 Boris Stankovich, 18 Martin Castrogiovanni, 19 George Skivington, 20 Steve Mafi, 21 Ben Youngs, 22 Jeremy Staunton, 23 Niall Morris.
Ulster: 15 Simon Danielli, 14 Andrew Trimble, 13 Darren Cave, 12 Nevin Spence, 11 Craig Gilroy, 10 Ian Humphreys, 9 Paul Marshall, 8 Pedrie Wannenburg, 7 Chris Henry, 6 Stephen Ferris, 5 Dan Tuohy, 4 Johann Muller, 3 Declan Fitzpatrick, 2 Rory Best, 1 Tom Court.
Replacements: 16 Nigel Brady, 17 Paddy McAllister, 18 Adam Macklin, 19 Lewis Stevenson, 20 Willie Faloon, 21 Ian Porter, 22 Paddy Jackson, 23 Adam D'Arcy.
Referee: Romain Poite (France)