Lamichhane, who played an influential role in Delhi's second win in five outings at home, believes he has to prove himself every time he gets a chance.
"I have always wanted to do my job. I have to prove myself every time I get my chance," the 18-year-old leg-spinner said at the post-match press conference.
Here's the video of Lamichhane's crucial three-wickets haul...
Lamichhane has not played many games but still he has no complaints.
"Sometimes it feels disappointing (being not picked in the playing XI), but at the end of the day, you need good reserves and I think they have got much more knowledge on cricket.
"They have plans in their minds and that's why they chose different playing XIs. You just need to keep improving," said the Nepal national team spinner who has played T20 leagues across the world.
The Kotla pitch has been criticized time and again, but Lamichhane feels that Delhi would be happy to play on a similar track.
"Pitch was good today, it was turning a bit at the start but after that it was coming nicely onto the bat. The poor bowling today was due to dew factor and it was really wet and hard to grip.
"Pretty happy with the pitch, it will be a good game if we get these kinds of wickets, but there was dew and that was the main factor tonight. Gripping was difficult, but there was turn on the pitch," said Lamichhane.
Lamichhane admitted that taking the big wicket of star batsman Chris Gayle may have turned the game around.
"I think yes, probably, it was a much-needed wicket for us. Chris Gayle was looking in good form and he hit 70 runs in 35 or 36 odd balls, he was in brilliant touch.
"Anywhere you bowled he was just smashing all over the ground. And getting those two wickets in the 13th over, it was really good for us."