Joe Willock, one of two teenagers in the Gunners’ starting line-up, scored twice in the first half and Alex Iwobi added a third in the 82nd minute to secure a 3-0 victory.
Crystal Palace 1-0 Grimsby Town
Crystal Palace escaped embarrassment after Jordan Ayew produced a late winner to end 10-man Grimsby’s defiance in their FA Cup third-round tie at Selhurst Park.
Ayew nodded home Jeffrey Schlupp’s free-kick in the 87th minute as the Premier League club finally broke the deadlock amid relentless one-way traffic.
Grimsby defended for virtually the entire game after Andrew Fox was shown a red card in the second minute for a studs up tackle on Andros Townsend that referee Martin Atkinson viewed as a booking only to be over-ruled by the VAR.
Newcastle 1-1 Blackburn Rovers
Matt Ritchie got Newcastle out of jail as his late penalty secured an FA Cup third-round replay against Sky Bet Championship Blackburn.
The midfielder struck from 12 yards with six minutes remaining to secure a 1-1 draw just when it looked as though Bradley Dack’s 56th-minute header had condemned the Premier League Magpies to a seventh third-round exit of Mike Ashley’s controversial 12-year ownership.
Bristol City 1-0 Huddersfield Town
Bristol City added to Huddersfield’s Premier League troubles by knocking them out of the FA Cup with a 1-0 win at Ashton Gate.
A third-round tie low on quality was settled by Josh Brownhill’s 72nd-minute strike, the midfielder dispatching his fourth goal of the season after twisting and turning in a congested penalty area.
Norwich City 0-1 Portsmouth
Portsmouth substitute Andre Green struck deep into injury time to earn the League One leaders a dramatic 1-0 FA Cup third-round win over Championship high-flyers Norwich at Carrow Road.
Green had two bites of the cherry from just inside the box after Pompey had caught the hosts on the break and took the second one to sink a home side who had to play 75 minutes with just 10 men after the early dismissal of Grant Hanley.
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