In May 2011, Donald beat Lee Westwood in a playoff to win the European Tour's flagship event, the BMW PGA Championship at the Wentworth Club. This was Donald's fifth victory on the European Tour and in the process achieving one of the game's highest accolades of becoming the world number one. Westwood had entered the tournament as number one in the world and the sudden-death playoff at the end of 72 holes provided a subplot of world numbers one and two contesting for the championship. On the first playoff hole, the par-five 18th, after both laying up with their second shots, Donald played a pitch for his third shot to leave himself a putt of no more than six feet for birdie. Westwood's approach shot to the green spun back into the water hazard. Westwood chipped out from the drop zone and made double bogey, leaving Donald to hole out for a birdie to win the title and become the new world number one. Donald was the third Englishman to hold the number one position in the Official World Golf Ranking since its inception in 1986.