"We've been on a fantastic unbeaten run and when you're in a cup final you want to make sure you win it.
"I've never played at Wembley. I warmed up for the Community Shield this season, but that’s about it, so I'm really looking forward to the game."
Evans' ankle injury flared up during Tuesday's draw at Inter Milan, but providing he recovers sufficiently he is set to start on Sunday – although the same can't be said for fellow defender Rafael, who has fractured his ankle.
Evans said: "My ankle is a lot better now, it's pretty stable and the only reason I had painkilling injections against Inter was to take the edge off it, to take away the pain.
"It’s a shame that Rafael’s out injured – he’s really disappointed he’s not going to make it, but that’s football and it can happen to anyone at any time.
"It would be fantastic for the other youngsters in the squad to pick up a winners' medal so early on in our careers. And we won’t be overawed."
Cup holders Spurs are in the wrong half of the league table but have improved since Harry Redknapp took over in October, and Evans says United won't take them lightly.