GULLANE, Scotland -- Tiger Woods will begin the pursuit of his fourth Open Championship on Thursday afternoon at 2:45 p.m. local time (9:45 a.m. ET) along with former U.S. Open champion Graeme McDowell and former Open champ Louis Oosthuizen.

The groupings were announced Monday afternoon at Muirfield, site of the Open for the 16th time, and run from 6:32 a.m. until 4:13 p.m., with all 52 threesomes playing from the first tee.