Former world No. 1 Tiger Woods has pulled out of the Dubai Desert Classic ahead of his second round because of a back problem, the European Tour said on Friday.

The American 14-time major champion, now ranked 666th after his long injury layoff due to back problems, recorded a miserable five-over 77 on the opening day on Thursday.

Appearing for the eighth time in Dubai, where he has won twice with a 92-under par record for the 28 rounds played there since 2001, the 41-year-old Woods looked out of sorts as he continued his comeback at the European Tour event.