Tim Southee's fitness is being monitored by medical staff ahead of the New Zealand cricket team's final Champions Trophy pool match against England.
The pace bowler has an ankle twinge.
Coach Mike Hesson says it has hindered his ability to bowl at full capacity in the last few matches.
Southee struggled with the ball against Australia, taking none for 26 from four overs and going for 12 in his first. He went wicketless against Sri Lanka and took a knock to the boot edging New Zealand to victory with one wicket to spare. Southee also had a rare off day in the final match of the England series where he conceded runs at 7.22 an over and misfielded on occasion.
Hesson felt it was a side effect from his workload spearheading the New Zealand test attack. Southee was the pick of the New Zealand bowlers at Lord's where his 10 wickets earned a place on the honours board.