Robben said: "For my body, it's best to rest. I played on Wednesday but I was not 100 per cent. I came on and after 10 minutes my ankle was quite bad.
"It was difficult to carry on but I couldn't do anything dangerous, dribbling or anything special and I know I'm not 100 per cent.
"But you know that you have to play now. Liverpool is such an important game. I will try, of course. I know it's a risk, but we have to see if we are ready for Anfield."