"He's very clever, very smart on the pitch, and he'll punish you when you least expect it," said Rutten.
"When you least expect it he'll re-appear suddenly and make something happen. He has a lot of experience and talent.
"Maybe you think you have him under the cosh, then he'll surprise you. [Last week] we stood off him initially, but then we doubled up on him and Gervinho, and that could happen again tomorrow."