As an amateur held the world No.1 ranking longer than anybody else – 135 weeks in total between May 2015 and February 2018. Alongside her twin sister Lisa she represented Europe in both the Junior Ryder Cup – a mixed event – and two Junior Solheim Cups before they both turned professional in 2018.
Her joint sixth in last year’s Evian Championship was highlighted by a closing 10-under 61 which equalled the lowest-ever round in a major by a man or woman set two days earlier by Jeong-eun Lee. That led to a first Solheim Cup cap as a wild card pick by captain Catriona Matthew and in Europe’s dramatic victory she was the star of the show, earning 4½ points out of a possible five. It was the best-ever performance by a cup rookie and this February she became the first Irish winner on the LPGA Tour.