Rory McIlroy struggles at Valspar Championship

Rory McIlroy's Masters preparations suffered another blow as Tiger Woods showed flashes of his brilliant best in the Valspar Championship.

McIlroy's only birdie in an opening 74 came courtesy of holing a bunker shot on the seventh, his 16th hole of the day, while two bogeys and a clumsy double-bogey seven on the fifth left him three-over-par.