Ronnie O’Sullivan leads Ryan Day as Stephen Maguire reaches Crucible quarters

Ronnie O’Sullivan leads Ryan Day at the World Championship (Martin Rickett/PA)

Ronnie O’Sullivan showed signs of his best form as he took a 5-3 lead on Ryan Day at the World Championship.

Both players made a number of big breaks in a high-quality first session of their last-16 clash at the Crucible.