Speaking ahead of Sunday's game against Tottenham, live on Sky Sports, he said: "That is part of the market. The market has got offers and demands.
"I think we did everything to try to bring this [player] here but we have to accept that. It's part of our job.
"When you are in negotiations they are about two parts and we can do nothing.
"Obviously the money is part of the negotiations but I don't know the reason. We have got in our club the concern to try and bring a couple of targets.
"We have got another option and we have to continue with our job.
"Sometimes we expect this and we have to be prepared for this because it's part of the market."