Sadio Mane’s precise third-minute finish put the Reds ahead at a freezing Anfield, but Harry Maguire’s equaliser in first-half stoppage time earned a draw for Claude Puel’s visitors.
Having withstood a confident start to the second half by the Foxes, Jürgen Klopp’s team spent much of the remainder on the front foot.
A winning goal was not forthcoming, but Liverpool’s advantage now stands at five points with 14 matches remaining.
Team news
Georginio Wijnaldum returned to the Reds’ starting XI as one of two changes from the 4-3 win over Crystal Palace 11 days ago, with Xherdan Shaqiri also coming in.