Dustin Johnson extends lead in Boston with strong finish

The American streaked away from Scottie Scheffler and Harris English on the 17th hole with a 20-foot birdie putt, and followed with a 40-footer for an eagle on the final hole.

Dustin Johnson unleashed a powerful finish to move out to a five-shot lead in the Northern Trust at TPC Boston with a third round of seven-under 64.

The American, who led by two shots after Friday in quest of a victory that could make him world No 1, streaked away from Scottie Scheffler and Harris English on the 17th hole with a 20-foot birdie putt, and followed with a 40-footer for an eagle on the final hole.