England's Lee Westwood broke clear of the field down the front nine in the third round of the British Open on Saturday.
The 40-year-old Ryder Cup star sunk a monster putt from the edge of the green for an eagle at the fifth and then birdied the par-three seventh to lead by three at four under par.
But a missed four-footer at the eighth cut his lead to two shots. Playing partner Tiger Woods had been the first to overtake overnight leader Miguel Angel Jimenez on the back of a 12-foot birdie putt at the second.
The 49-year-old Spaniard missed a short putt at the same hole minutes later.
Woods was at three under, but dropped shots at the fourth and seventh just as Westwood broke loose.