The Ghana midfielder found himself on the losing side in league action in Germany
Kevin-Prince Boateng and Hertha Berlin suffered their fifth German Bundesliga defeat of the season with a 1-0 home loss to Freiburg on Saturday.
Krzysztof was on target for the hosts but replies from Phillip Lienhart and Nils Petersen sealed a valuable victory on the road for Freiburg.
Hertha are left in 13th position on the league table after the defeat, three places above the relegation zone and several spots below third-positioned Freiburg.
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Boateng was in action on the day for Hertha, lasting until the 59th minute when his spot was taken by Dennis Jastrzembski.