The competition is United's only remaining hope of silverware this season following Tuesday's defeat at home to Sevilla, and Matic now has his sights firmly set on lifting the trophy in May.
"Without pressure they don't perform well, so what can I lose?"
Romelu Lukaku opened the scoring for Manchester United.
"The biggest frustration is not a bad result because this can happen, it's when I work on the [training] pitch and don't see the situations on the pitch".More news: Feinstein wants Haspel's records in interrogation program declassified
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Jose Mourinho has told his struggling Manchester United stars they must "learn to survive" with the pressure of playing for the club after some disappointing recent displays. The Red Devils started in bright fashion and dominated the game throughout the 90 minutes.
"I have to say, for example, [Scott] McTominay lost more passes today than in all the matches he played together", Mourinho added.
That made Shaw an obvious target for Mourinho to be questioned about although the United manager clearly had other players in mind when issuing his widespread critique.
"Matic was an island of personality, surrounded by not water but lack of class and desire". But to try to change our offensive football and be more aggressive, I had to change one of them and I decided Luke.
Explaining his decision, Mourinho said: 'It was a decision was one player for another player in the same position. Because one thing is to play and it's another thing to be on the pitch it's hard to have a good performance, so no, I'm not happy with the performance at all.