West Ham keeper Jaaskelainen happy working with coach Margetson
The former Bolton Wanderers goalkeeper joined the Hammers in the summer.
He praised his goalkeeping coach Martyn Margetson for helping him to continue improving, despite the fact he has spent more than 15 years playing in the Premier League.
"I was very lucky to have a very good goalkeeping coach for 13 years at Bolton Wanderers [in Fred Barber] and I think it is very important to work hard in training. I am very happy with the work I have been doing with Marge - he is continuing to bring a lot of new things into my game which, as a 37-year-old, is great," Jaaskelainen told West Ham TV.