A late penalty converted by Habib Diarra earned the points for Sunderland.
Speaking after the 1-0 defeat, Farke told LUTV: “One of these cruel evenings of football.
“Sometimes, you have to take it. You are so dominant, you dominate the game, you create shot after shot, cross after cross, corner after corner.
“You don’t give one chance away but somehow the opponent is in the dressing room and wins this game 1-0 without really having a chance. It is of course frustrating and disappointing and tough to take today.
“It is difficult to open them. This is why they have won so many points on this level. I think what was a bit missing in the first half was a bit more clarity in the final third.
“We were so dominant but I think we should have been a bit more precise with the final pass, precise with the final corner kick, with the final cross. Also to anticipate it a bit more, like a bit more of the accountability in the final third.
“So to work the ball in, the quality to bring the ball somehow over the line, this was if we are self-critical missing today.
“But sometimes the game of football is also like this, you can’t really explain, and the opponent can't explain how they have won this. This was one of the games.”