Answer:
Endorphin.
Step-by-step explanation:
As per the description given, Ali's present situation would be due to increased 'endorphin levels' that make him feel lesser pain. 'Endorphin' is demonstrated as the chemicals that the human nervous system secretes to cope up with the stress or pain that humans suffer. Due to the wound that Ali receives during the Soccer game, his nervous produces a sufficient amount of 'endorphin' and due to which he feels 'lesser pain' and 'continues to play' without giving attention to his pain.