With Manchester City already through to the final at Wembley on 25th February, we now await the second finalist as Arsenal welcome Chelsea to the Emirates.
The first leg at Stamford Bridge finished goalless so, could we be in for another tight match or will Chelsea sneak through on away goals after 120 minutes?
Arsenal will be without new signing, Henrikh Mkhitaryan due to him being cup tied.
Aaron Ramsay has recovered from illness whilst Nacho Monreal has overcome a leg injury, so both could feature.
Chelsea are definitely without Cesc Fabregas (hamstring) and Alvaro Morata (back).
Centre back, Andreas Christiensen is available after recovering from a head injury.
Since the first leg, Arsenal have lost and won one against Bournemouth and Crystal Palace respectively.
Chelsea meanwhile drew against Leicester before needing penalties in a FA Cup replay to get past Norwich.
They then got their first win of 2018 at weekend with a 4-0 away win at Brighton & Hove Albion.
Both teams got four goals in their games at weekend and drew here 2-2 in first week of 2018.
That means that we should see goals galore but Arsene Wenger needs a trophy to keep fans happy.
For that reason, I can see Arsenal edging this in a thriller.
Prediction: Arsenal 3-2 Chelsea AET
Result: Arsenal 2-1 Chelsea (After normal time) (Arsenal win 2-1 on aggregate)