May 11 (Reuters) - England fast bowler Gus Atkinson was substituted out of a County Championship ​match on Sunday and later ‌failed a concussion test after being hit on the helmet twice while batting, raising concerns ​about his fitness ahead of ​next month's test series against New Zealand.

The ⁠seamer was struck twice on the ​head by international teammate Josh Tongue ​in Surrey's match against Nottinghamshire but initially continued batting after on-field assessments.

The 28-year-old later called for ​further treatment before retiring hurt on ​27.

"Obviously, he failed a concussion test, that's why ‌he ⁠is out of this game," Surrey head coach Gareth Batty said in a video posted on the team's Instagram ​page.

"He felt ​like he ⁠was OK, but duty of care comes into it. We ​will keep an eye on ​him ⁠now and make sure he is healthy."

England are scheduled to host New Zealand ⁠in ​a three-match test series ​beginning at Lord’s on June 4.