Olivia Mehaffey said goodbye to the junior ranks with an astounding 16-shot win in the Telegraph BMW Junior Championship at Quinta do Lago.

The world No 16 finished on six under par 210 adding a 69 to previous rounds of 71 and 70 with Eloise Healy second on 10 over 226.

Mehaffey retained the Irish Girls Stokeplay this year and then made it three wins on the spin with victories in the Scottish and Welsh Open Amateur Strokeplay championships.

Winner of the LGU order of merit, which guarantees her an exemption into next year’s Ricoh Women’s British Open, she’s destined to play at Arizona State Univerisy late next year.

Mehaffey, who suffered an early round blip with a run of three bogeys, told the Telegraph: “Whatever lead you have, it feels like everyone is breathing down your neck. I was shaky after those bogeys but managed to relax and enjoy the back nine.

“I looked at the honours board the other day and to win alongside the other girls is such an honour. It’s a great event and I’m really grateful to be a sponsors’ invite and win it.

“It’s my last ever junior competition and I put my year down to the hard work over the winter.”

This 30th Championship saw an array of talent take to the North Course as the 21 finalists aimed to join the likes of Justin Rose, Matthew Fitzpatrick, Carly Booth and Melissa Reid.

Jamie Li won the Boys title by one stroke in five under from John Gough.