London: New Zealand face an anxious wait over the fitness of Kyle Mills for their one-day series finale with England after the pace bowler suffered a lower back spasm while batting during a practice session at Lord's.
All-rounder Grant Elliott was already doubtful for Saturday's match after suffering a bruised thigh during a collision with England quick Ryan Sidebottom which led to his controversial run-out in New Zealand's dramatic one-wicket win at The Oval on Wednesday.
A New Zealand team spokesman said Friday that Gareth Hopkins, a wicket-keeper batsman, would come in if Elliott was not fit with fast bowler Michael Mason set to step in should Mills not recover in time.
Wednesday's victory left New Zealand an unbeatable 2-1 up in the five-match series ahead of their first one-day international against England at Lord's.
England will have to make a change after a slow over-rate at The Oval led to captain Paul Collingwood being suspended for four games.
Kevin Pietersen will lead the team in Collingwood's absence with his Hampshire colleague Dimitri Mascarenhas the nearest like-for-like replacement for the Durham all-rounder in the England squad.
England: Ian Bell, Luke Wright, Kevin Pietersen (capt), Ravi Bopara, Owais Shah, Tim Ambrose (wkt), Dimitri Mascarenhas, Graeme Swann, Stuart Broad, Ryan Sidebottom and James Anderson
New Zealand: Jamie How, Brendon McCullum (wkt), Ross Taylor, Scott Styris, Jacob Oram, Daniel Flynn, Grant Elliott/Gareth Hopkins (wkt), Daniel Vettori (capt), Kyle Mills/Michael Mason, Tim Southee and Mark Gillespie
Umpires: Steve Davis (Aus) and Nigel Llong (ENG). Third umpire: Richard Kettleborough (Eng). Match referee: Javagal Srinath (Ind).