Stoke boss Mark Robins was a frustrated man after seeing his side beaten by a "rubbish" stoppage-time goal at Millwall.
Mihailo Ivanovic's penalty, after Ben Wilmot was adjudged to have fouled Josh Coburn, gave the Lions the points after the game looked set to end in stalemate.
"It was a game short on quality all the way through apart from when we got on the ball," Robins told BBC Radio Stoke.
"First half, we played some reasonable football - they're spoilers, they set their stall out to do what they did, but we can't become embroiled in that, which happened in the second half.