Photo by Grace Smith (For Editorial Use Only”)

When Rory McIlroy sank the winning putt at the US Masters in Augusta last Sunday, his bank balance instantly jumped by $4.2m (€3.7m), the prize pot for the champion. His net worth increased by multiples of that.

“His contracts with Nike and the others will include bonuses for winning the Masters – you’re talking seven figures,” says Trevor Twamley, chief executive of the sports-marketing platform Sport Endorse.

“Also, more Omega watches will be sold, more TaylorMade golf balls, and Rory probably has royalties on all those deals. He is getting a sum per item sold. He earned $45m last year off the course, but it could be up to $100m now with his royalties.”

Read the full story on the Irish Independent: How Rory McIlroy’s Grand Slam could make him $100m a year richer