Sandeep Yadala, 30, was injured after grappling the robber to the ground in the second attack his shop in Timperley, Greater Manchester, has seen in a matter of months.
During the latest incident last week, he suffered slash wounds to his side and right hand as he grabbed the intruder, disarmed him and pinned him to the ground until police arrived, the Sun reported.
Local police arrived three minutes later and arrested a 15-year-old raider and praised Yadala as "brave".
The suspect has now been released on bail.
Yadala previously tackled a gang of four masked raiders when they stormed into his shopin February last year. He was seen on CCTV cameras in the previous incident fightingone of the four as they stole cigarettes worth 3,000 pounds.
Yadala, who came to the UK to pursue a post-graduate degree, manages the store part time.
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