The Slovakian forward made his impression in the build-up to the 2012-13 season when he featured for on trial a Wigan Athletic XI in a 2-2 draw with Stockport County.
The former Manchester City youngster assisted Josh Sumner for his goal and scored the equaliser with a well timed side footed volley at the front post.
Orsula became the third addition to the Under 21 squad after the arrival of Guillermo Andres and Eduard Campabadal who came from Spain earlier in the summer, when he joined on a free transfer from Dutch side FC Twente.
His start to the 2012-13 season has been impressive and he secured Latics a victory against Coventry City when he lashed the ball into the top corner to make the game 2-0.
Filip made his first team debut as a late substitute in the 4-1 Capital Cup win against West Ham United in 2012.