Slovakia are contesting the tournament for the first time as an independent nation after surprisingly topping their qualification group but few pundits expect them to make waves in South Africa.
And VfL Bochum forward Sestak is happy for that to be the case. He told bundesliga.de: "We have nothing to lose. The fact we are participating is already a big achievement, so now we can play freely.
"However, our main goal is to get through the group stage. We want to reach the second round. Italy are obviously the big favourites to win the group, but the game against Paraguay will be close and we reckon we can beat New Zealand too."