Danny Welbeck and Theo Walcott proved the difference on their return from injury, as their goals helped Arsenal to a 5-0 victory over Southampton at St Mary's Stadium.
A one-sided tie was as good as over halfway through, with two smart Welbeck finishes - the first rounding off a 16-pass move - being followed up by a strike from Walcott.
The former Saint added another couple in the final quarter of the match to put the icing on the cake, meaning a place in the fifth round of the FA Cup for the Gunners.
Relive how the 90 minutes of action unfolded with Sports Mole's live text coverage below.
SOUTHAMPTON XI: Lewis, Martina, Stephens, Gardos, McQueen, Reed, Clasie, Hojbjerg, Sims, Isgrove, Long
ARSENAL XI: Ospina, Bellerin, Mustafi, Holding, Gibbs, Chamberlain, Maitland-Niles, Walcott, Reine-Adelaide, Perez, Welbeck
SOUTHAMPTON SUBS: Taylor, Yoshida, Bertrand, Davis, Romeu, Tadic, Redmond
ARSENAL SUBS: Martinez, Monreal, Mertesacker, Jenkinson, Iwobi, Sanchez, Gabriel
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Claude Puel: "It's important to put this experience for next year in European games. It'll be important to qualify. It will be important for the squad to continue the work, to improve, and know the possibilities to play European games.Now we go to Wembley, not just to participate but to win this cup."
Arsene Wenger: "[Late goals] is a very interesting quality in the squad. On top of that, the contribution of the players coming off the bench this season has been absolutely remarkable. That shows you as well that there is a great unity in the team. These are qualities that will be very important going into the last four months now."
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SOUTHAMPTON SUBS: Taylor, Yoshida, Bertrand, Davis, Romeu, Tadic, Redmond
ARSENAL SUBS: Martinez, Monreal, Mertesacker, Jenkinson, Iwobi, Sanchez, Gabriel
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