Watch: McIlroy 4-putts from 11 feet at Dell Technologies

Rory McIlroy's putter has let him down all year, and the trend continued Friday at the Dell Technologies Championship in Boston.

McIlroy laced a beautiful tee shot at the par-3 11th, giving him an eleven-foot birdie look - but then his flatstick went very cold.

The Northern Irishman raced his first putt well by the hole, then missed the next two attempts, before tapping-in for a double-bogey five.