West Ham boss Allardyce hails impact of calm Jaaskelainen
The Finn kept a cleansheet in victory at Newcastle United yesterday.
Allardyce said: "Every now and again the odd shots that they had on goal were saved by our goalkeeper, who has a massive amount of experience.
"He didn't panic or put us under any pressure. He made the clean sort of saves that you'd expect him to make. The foundation of a successful season is your goalkeeper and your defenders keeping as many clean sheets as possible."