"But it's not just him, I also think some of the other youngsters have done really well - and that's not just what you are seeing in the games, they are also impressing during training too."
Kuyt also had encouraging words for the likes of debutant Andrea Dossena and the club's other new boys, Philipp Degen and Diego Cavalieri.
"They are all good lads," he continued. âI haven't spoken too much to them because I've only been with them a few days but they are nice lads and have done well in training too. Hopefully they can enjoy a good first season with the club."