(Reuters) - Jason Day's preparations for his title defense at this week's Farmers Insurance Open outside San Diego were badly hampered on Wednesday when he withdrew from the pro-am competition because of flu-like symptoms. The Australian world number two, who triumphed at Torrey Pines last year in a four-way playoff, also pulled out of his scheduled pre-tournament news conference on Wednesday. Day, who enjoyed a career-best season on the PGA Tour last year that included his first major title at the PGA Championship among five wins, has been eagerly anticipating his title defense at Torrey Pines. More...