Spieth takes inspiration from his sister – ‘the best thing’ in his family

family,” he said. “It helps put things in perspective that I’m lucky to play on tour and to compete with these guys, it’s been a dream come true. I definitely attribute a lot of that to her.

“She’s the funniest person in our family. It’s humbling to see her and her friends and the struggles they go through each day that we take for granted, where it seems easy for us and it’s not for them. At the same time, they are the happiest people in the world.And when I say ‘they,’ I speak to special needs kids. My experience with her and with her friends, it’s fantastic. I love being part of it, helping support it.”

Predictions value victory at £15m in new or augmented endorsements this year, a proportion of which will be pumped into the Jordan Spieth Family Foundation, a charity that provides support to children with special needs, military families and junior golf programmes. He can also pay off the $2.3m mansion he bought recently in his home city of Dallas, Texas.

Of all the phone duties that came his way in the postvictory scramble, the call to his sister was the one he was looking forward to most. She might not discern the significance of the victory or place the Masters in the wider context of golf or sport, but she understands the simple concept of winning, as he explained after his defeat in the play-off in Houston the week before.

“She’s going to probably tell me to just bring something home, bring a present home. I’m sure she was watching and was excited when she saw how happy I was with my family there at the end. Probably got a little jealous at that point. But she’s just going to be happy that I won.”

Spieth, who is engaged to his high-school sweetheart, is scheduled to play the RBC Heritage at Hilton Head, starting on Thursday, his sixth tournament in seven weeks. You would assume the sheer scale of this achievement might catch up with him at some point. Then again, there is little in the career of Spieth that follows convention.

His win at the Masters took him to No 2 in the world rankings. Only Rory McIlroy stands between him and his goal of becoming the world’s best player. That sets up the summer nicely.