Uncertain over return, Tiger says recovery 'very slow'

Mar 9, 2014; Miami, FL, USA; Tiger Woods lines up a putt on the 2nd green during the final round of the WGC - Cadillac Championship golf tournament at TPC Blue Monster at Trump National Doral. Mandatory Credit: Andrew Weber-USA TODAY Sports

(Reuters) - World number one Tiger Woods says his recovery from back surgery has been a "very slow process" and he remains unsure over when he can return to competitive golf.

Woods, who has won 14 majors, has been sidelined since going under the knife for a pinched nerve in his back at the end of March, forcing him to miss last month's Masters tournament for the first time in 20 years.