Non-league Lincoln City's astonishing run in the FA Cup came to an end as Arsenal remain on course for a 13th title by reaching the semi-finals. Lincoln, 88 places below their Premier League opponents, held their own for much of the first half and even went close to scoring when Petr Cech saved Nathan Arnold's curled effort. However, Theo Walcott's deflected strike gave the Gunners the lead on the stroke of half-time and Olivier Giroud put the hosts in control with a clinical strike just after the break.