Foster was named Man of the Match in the final against Tottenham.
The England international impressed during the match and saved Tottenham’s opening spot-kick.
“It is fantastic, it was a crazy game,” he told Sky Sports.
“The last 30 minutes were played at walking pace but it was fantastic to get the win.
“The pitch was starting to tear up but it is the same for both teams, they put us under pressure but it is awesome.
“We are Manchester United and we want to win everything.”
