Mike Weir tied the course record with a 10-under-par 63 to take a three-stroke lead after the first round of the USPGA season-opening Mercedes Championship in Hawaii.

First round scores from the Williams World Challenge at The Sherwood Country Club Golf Course, Thousand Oaks.

Vijay Singh put himself into contention for a first victory of 2001 by claiming a share of the lead on day one of the Buick Challenge in Georgia.

Leading 3rd round scores and totals in the USPGA Byron Nelson Classic, Irving, Texas

Tee-off times in the third round of the Masters tournament at Augusta National, Georgia, (USA unless stated, all times Irish):