Lee Westwood cracked open the champagne to celebrate the most satisfying moment in his career - but only after a supermarket trip "to buy rubber gloves and mashed potatoes".
Westwood will be officially confirmed as the new World Number One on Monday morning after Martin Kaymer failed to achieve the top-two finish required in the Andalucia Valderrama Masters.
Kaymer needed to win or share second place with no more than one other player if he, rather than the absent Westwood, was to succeed Tiger Woods when the American's 281-week reign ends this week.
But the USPGA champion never threatened to do so and was outside the top 20 when he signed for a closing 75 at Valderrama.
Westwood had been keeping an eye on Kaymer's progress all week, and that extended to monitoring the European Tour's website in Sainsbury's as he ran errands today.
The champagne duly flowed at home later as Westwood reflected on a remarkable turnaround in fortunes which sees him become Europe's first number one since Nick Faldo in 1994, seven years after slumping to 266th in the rankings.
Asked if it was the most satisfying moment in his career, the 37-year-old said: "Yes I think so. It's a dream everyone has to say there is nobody better than me at the moment. You have to say it's a highlight.
"It's a great honour and a big responsibility. It certainly sounds and feels good right now.
"When you are growing up and people say what do you want to achieve, everyone says I want to be the best in the world. Right at this moment I can show people the world rankings and say I am the best on the planet."
Westwood will quickly come face to face with the man he deposed as world number one, with Woods among the field at the forthcoming WGC-HSBC Champions event in Shanghai.
And the Englishman expects some good-natured banter from the 14-time major champion in China.
"I have a great relationship with Tiger," added Westwood, who travels to Shanghai on Monday afternoon.
"We have mutual respect and have always got on well, on and off the course. I give him a little bit of stick and he gives me a little.
"When Tiger was in his pomp everyone thought it (being number one) was unattainable.
"But form comes and goes - I'm a perfect example of that - and when we started to get a bit nearer the top of the rankings we started to think it was attainable."