England off-spinner Shoaib Bashir said he is "not perfect" and "learning on the job" after his four wickets on the opening day of the first Test against New Zealand in Christchurch.
Bashir, 21, has had a rapid rise since making a surprise England debut on the tour of India. No other bowler has sent down more deliveries in Tests than Bashir this year.
The Somerset man struggled during the 2-1 series defeat in Pakistan last month, but his 4-69 helped limit New Zealand to 319-8 at Hagley Oval.
"I wouldn't say I was disappointed but there was a bit of frustration when I was bowling out in Pakistan," Bashir told the Test Match Special podcast.
"I'm still 21, I've still got a lot of learning to do. I'm just enjoying every moment and I'm just so thankful."
After England won the toss and chose to field on a green surface, Bashir said he was not expecting to get through the 20 overs he bowled.
He had Rachin Ravindra clip a full toss to mid-wicket, only for Kane Williamson's 93 to give New Zealand the upper hand.
But Williamson's chop to point off Gus Atkinson opened the door for England and Bashir took the final three wickets to fall in the day. He is only the second spinner to take a four-wicket haul at Hagley Oval and has the opportunity to become the first to claim a five-for.