He said: "I don't feel pressure. People ask 'why did he cost that much' but that's just football.
"Wayne Rooney got bought for more than me and in the first year at Manchester United, he didn't have an easy year.
"I am reading his book at the moment. I am a very big fan of his book.
"It is very good for a player my age because he went to a big club at the same age as me and I can learn from that."