Amir was helped from the field after digging his right knee into the Gabba turf midway through the final session of the first Test against Australia. Australia were on 220/3 and Peter Handscomb pulled a ball from Wahab Riaz down towards the fine leg region.
Amir was fielding in that position and he went for the ball there. While holding the ball, Amir misfielded as he slid towards the ball, his knee going into the soft turf and stopping his movement suddenly as the ball trailed behind him to the rope.
The pace sensation appeared to twist his leg in an indecent manner immediately. His teammates ran to the bowler as soon as they had seen the incident.
Watch the video here: