The Arsenal youngster who has Ghanaian parents was on the scoresheet as Arsenal held the host, Basel to a 1-1 draw.
The 17-year-old broke the deadlock of the game in the 80th minute, Liechti put FC Basel on level pegging in the 2nd minute of added time.
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Nketiah has been on a goal scoring spree, having scored five goals in four games including a hat-trick against Chelsea.
The youngster has registered 10 league goals for the U18 side and scored four times for the U23s.