Fred Couples shot an opening-round 66 to take the lead after one round at the Masters on Thursday. Couples held a 1-shot lead on the field, a group that includes Phil Mickelson, Tom Watson, Lee Westwood, K.J. Choi and Y.E. Yang. In his return to competitive golf, Tiger Woods finished the first round two shots off the pace at 4 under. Woods, who was greeted warmly by the crowds, had a pair of eagles on the day, the first time he had two eagles in one day at the Masters and his best score ever on the tournament’s first day.