Stoch is currently on a season-long loan with Twente, but his contract with Chelsea expires in the summer of 2011.
Chelsea regard the 20-year-old as an exciting prospect.
“It should be a long-term contract,” Stoch’s agent Milan Lednicky told the player’s official website.
“However, it is of no importance to reveal more at the moment. The situation will be clearer some time during the spring.”
