Jack Leach has withdrawn from England's first test match of the summer after displaying concussion symptoms following a dive to save the ball from the boundary.
Matt Parkinson, the Lancashire leg-spinner, has been called-up to replace him and will make his test debut as England's first ever concussion substitute.
Leach, the 30-year-old left-arm spinner, landed awkwardly on his head after trying to stop the ball reaching the boundary in just the sixth over of the match against New Zealand at Lord's.
The England and Wales Cricket Board released a statement after Leach received medical evaluation: "Jack Leach has symptoms of concussion following his head injury whilst fielding. As per concussion guidelines, he has been withdrawn from this Test. We will confirm a concussion replacement in due course."
Parkinson, 25, was later confirmed as the like-for-like replacement. He has represented England in both ODI and T20 formats but has not played a Test match despite being in numerous wider squads.