The 20-year-old Slovakian had a season to remember with FC Twente, where he helped secure the club's first ever Eredivisie title with 10 goals from 32 appearances under the leadership of Steve McClaren, the former England manager.
"I think it was a great season, when I went there I didn't expect it could be like that, that we could be champions but from the first day it was getting better and better and we kept on winning," Stoch explained to chelseafc.com. "I was so surprised and now we are champions, it was so great!
"My form was good until the winter break, then I had a little problem with my groin and didn't play so good, but in the end I was better and my play improved enough to score in the last two games."
Stoch added: "I don't know what will happen but we have to decide the best option for me, last year we decided really well when I went to Twente, and now I hope we will do the best again,' he explained. 'I want to play all the time like I did in Holland."