The Open Championship is organised by the R&A, and is included in the PGA Tour, European Tour, and Japan Golf Tour calendars under the major championships category. The tournament is a 72-hole (4 rounds) stroke play competition held over 4 days, with 18 holes played each day. Play is in groups of three for the first two days, and groups of two in the final two days. Groupings for the first two days are decided by the organisers, with each group having one morning, and one afternoon tee time. On the final two days, players tee off in reverse order of aggregate score, with the leaders last. After 36 holes there was a cut, after which the top 70 and ties progress through to compete in the third and fourth rounds. In the event of a tie for the lowest score after four rounds, a four-hole aggregate playoff will be held to determine the winner; this will be followed by sudden-death extra holes if necessary until a winner emerges.
