Patson Daka came on as a second half substitute and provided an assist as Salzburg lost 3-2 at Altach in the Austrian Bundesliga on Monday night.
The reigning league champions have been on a bad patch since the resumption from the long winter break, losing once and drawing the other two.
They were also booted out of the Europa League round of 32, losing 6-4 on aggregate to Eintracht Frankfurt.
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The hosts took a 2-0 lead thanks to a Sidney Sam brace.
Daka replaced Antoine Bernede and the 21-year old Zambia international laid the assist for Hee-chan Hwang in the 62nd minute to give Salzburg some hope.