* Woods played just one round in Dubai, shooting 77
* American failed to make cut in previous event on PGA Tour (Adds quotes, details)
DUBAI, Feb 3 (Reuters) - Former world number one Tiger Woods has pulled out of the Dubai Desert Classic ahead of his second round because of a back spasm, the European Tour said on Friday.
The American 14-times major champion, now ranked 666th after his long injury layoff due to a series of back issues, shot a miserable five-over 77 on Thursday, a round in which he failed to record a single birdie in perfect conditions.