Rory McIlroy ready to attack as quartet share Masters lead

Rory McIlroy has promised to go on the attack in Saturday's third round as he bids to join the Masters pacesetters,
.The world number two was left cursing a tentative third-round 77 at Augusta National last year as he lost a last group duel with Jordan Spieth by four strokes, eventually settling for a tie for 10th instead of the green jacket he needs to complete a career grand slam of majors.