Cahill won the Champions League two seasons ago with the Ivorian.
"It is going to be tough with the quality player he is," Cahill said.
"I have had the pleasure of playing against Didier before I came to Chelsea and I have trained against him a lot, so I know his qualities and he has a lot of them. So it is going to be tough but the game is going to be tough generally.
"It was tough over there, we took the first half and they pushed us back the second half, and tomorrow will be tight again but we are playing at home, we'll be on the front foot and hopefully it goes well."
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