Sunderland boss Martin O'Neill has welcomed Carlos Cuellar's impact.
O'Neill was pleased to see Carlos Cuellar get a key 90 minutes under his belt at Helsingborgs.
"It was an important 90 minutes for Carlos and I felt he did very well," O'Neill told safc.com.
"He tired towards the end, which is only natural, and I was very pleased for him."