McIlroy rues his driving difficulties

Rory McIlroy has left himself plenty of work to do at the midway point of the Shell Houston Open.

McIlroy struggled in the bright but windy conditions, adding a 71 to his first day 70 and move to three-under par on the Houston Golf Club course in suburban Humble.

He trails nine shots behind Ryder Cup-winning colleague Sergio Garcia, who tamed the conditions with an impressive seven under par 65 to move four shots in front as the afternoon half of the field took to the course.