Chelsea goalkeeping coach Christophe Lollichon says the desire of Petr Cech has never changed.
Lollichon compares the young keeper he coached at Rennes with the record-breaking one of today.
He told chelseafc.com: "Now he has more experience because Rennes is a good French club but it is not a top European club, and with Chelsea we play a lot of big games - finals, Champions League almost every year, and when you have his talent and you play at a big club, it is this combination that makes you at the top level.
"But we still analyse his games like we did when he played for Rennes, and every time he wants to understand what happened, why he conceded a goal. At the age of 31 he still wants to improve and become more perfect if it is possible, which for the goalkeeper coach is fantastic."