Paul James's charge-down of Harry Ellis's kick nearly gave the Ospreys a dream start to thesecond half, but Leicester got themselves out of a corner and stayed nine points clear until Hook's penalty, which came just after Flood limped off.
Something had to change for the Reds - and it did - Liverpool almost making a dream start to thesecond half when Dirk Kuyt forced a smart save from Cech eight yards out.