TEMPO.CO, Jakarta - Who is the best female golfer in the world? This is a question that has probably been a struggle to answer in recent times for all but the most dedicated of fans.
Yet Lydia Ko's ascension to the top of the world rankings is one of the most astonishing achievements the game has known.
At just 17 she is the youngest world number one of either gender, beating Tiger Woods by four years. By way of confirming her status, she is now celebrating victory in the Women's Australian Open.
It is the ninth triumph worldwide in a startling career to date for the South Korean-born New Zealander. This week she heads to Christchurch for her home Open, a tournament she won as an amateur two years ago.
Golf in 2015 has so far provided a packed news agenda which has overshadowed Ko's elevation to the top of the world.
With Rory McIlroy dominating the men's game and the settlement of his court case, the appointment of Darren Clarke as European Ryder Cup captain and the Open Championship television deal there has been plenty to discuss.
But now, in the wake of her excellent two-shot win at Royal Melbourne, it is time to take notice of the youngster setting the pace in the women's game.
"I don't even think it hits her what she's doing," said Australia's seven-time major winner Karrie Webb as quoted by BBC Sport.
"I keep saying that we're never going to see another young player this ready at this age, and then Lydia Ko comes along and sets the bar even higher for young players.
"At any age, it's an outstanding achievement to be number one in the world, but to do it at 17 is incredible."
Ko has already amassed $2.404m (£1.55m) in LPGA Tour prize money and her latest win was the fourth in which she has come from behind to secure victory.
BBC SPORT | IC
