The Czech keeper said: "We have a young team and the players are getting nervous. We are under a lot of pressure.
"It is a very difficult period for us. We have won only once this season and we need points quickly. The players are hurting that we are in the bottom three at this stage of the season.
"We have unbelievable players and before the season everyone was tipping us for the top four. It can't go on. We are Tottenham and we have to win the next league game."