Germany's Mack fires 63 to grab LPGA Portland Classic lead

Polly Mack opened and closed her round with back-to-back birdies on her way to nine-under par 63 and a one-stroke lead after Thursday's first round of the LPGA Portland Classic.Mack, a back-nine starter, birdied the par-5 10th and par-4 11th, then eagled the par-5 12th and birdied the 15th.

Germany's Mack fires 63 to grab LPGA Portland Classic lead

Germany's Mack fires 63 to grab LPGA Portland Classic lead

Germany's Mack fires 63 to grab LPGA Portland Classic lead

Germany's Mack fires 63 to grab LPGA Portland Classic lead

Germany's Mack fires 63 to grab LPGA Portland Classic lead