ST. ANDREWS, Scotland—Danny Willett celebrated his birthday by winning the Alfred Dunhill Links Championship by two strokes on Sunday. The Englishman took a three-shot lead into the European Tour event’s final round, which was played over the Old Course at St. Andrews. Willett shot a 4-under 68 and finished on 18 under par overall to claim his eighth professional win and first since the BMW PGA Championship in September 2019. Willett, the 2016 Masters champion, turned 34 on Sunday. “For everyone watching, this (win) seems quite out of the blue,” Willett said, “but the practice I’ve been doing at home and the inner belief we have every time we get in and out of position to do something was proven again.” Fellow Englishman Tyrrell Hatton, a two-time champion of the event, shot 67 and finished tied for second with Sweden’s Joakim Lagergren (66). Players in the field completed a round …