London, Jan. 12 -- Premier League leader Arsenal overcame conceding an early goal to reach the fourth round of the FA Cup with a 4-1 win away to Championship side Portsmouth.
Gabriel Martinelli scored a hat-trick for Arsenal, who showed how effective they are from set pieces after Colby Bishop rewarded Portsmouth's bright start with a third-minute opener.
Arsenal equalized following a scramble after a corner in the seventh minute, and Martinelli scored his first after another corner in the 25th minute.
Although Noni Madueke missed a first-half penalty for Arsenal, Martinelli completed his hat-trick with a far-post finish following a well-worked team move and a header from another corner to keep the Gunners in the race for four titles thi...