London (AFP) - New Zealand's Daryl Mitchell starred with the bat, after England debutant Matthew Potts had rocked the Black Caps once again, to leave the first Test at Lord's intriguingly poised at tea on Friday's second day.
New Zealand were 128 for four in their second innings, a lead of 119 runs, with Mitchell unbeaten on 43.
He received good support from wicketkeeper Tom Blundell (39 not out) in an unbroken fifth-wicket partnership of 72 after the pair had come together with New Zealand struggling at 56 for four.
Given how England had suffered a top-order collapse of their own in making 141 in reply to the World Test champions' seemingly modest first-innings 132, the Black Caps may yet be approaching a match-winning lead in the opening encounter of this three-Test series.
Durham quick Potts, who enjoyed a superb return of four for 13 in the first innings, struck again with a pre-lunch burst Friday of two for 11 in four overs.
For the second time in the match, the 23-year-old dismissed New Zealand captain Kane Williamson.
He had needed just five balls Thursday to claim the scalp of the star batsman as his first Test wicket.
And on Friday he produced a fine lifting delivery that Williamson could only edge to third slip Jonny Bairstow.
Williamson was out for 15 and New Zealand's 30 for two soon became 35 for three when Potts had opener Tom Latham (14) caught behind off such a thin edge that wicketkeeper Ben Foakes did not even appeal.
After lunch, Devon Conway -- who last year marked his Test debut with a brilliant double century at Lord's -- fell cheaply for the second time in this match when a mistimed pull off Stuart Broad was caught behind down the legside.
But Mitchell, the son of former All Blacks rugby coach John Mitchell, took advantage of an increasingly flat pitch to hit two fours off successive balls from new England captain Ben Stokes.
An inswinger from the all-rounder was clipped through midwicket before Mitchell drove Stokes down the ground.
With New Zealand now 90 for four off 32 overs, Stokes summoned Matt Parkinson for his first bowling stint in Test cricket.
The Lancashire leg-spinner became England's inaugural concussion substitute after being summoned from Manchester on Thursday to replace Jack Leach, who had fallen on his head while saving a boundary.
Parkinson bowled tidily without threatening a wicket, having earlier helped England into a slender first-innings lead of nine runs.
Parkinson walked out to bat with England still behind at 130 for nine.
But he got off the mark with a clipped two off Tim Southee, who took four for 55, before driving him down the ground for four -- one of the best shots of the innings.
Parkinson was last man out, caught in the slips off Trent Boult.
England resumed on 116 for seven, still 16 runs behind, after an extraordinary start to Stokes's reign as skipper had seen 17 wickets fall during the first day's play.
