Career
Early career
Born in Chrudim, part of historic Bohemia, Jirásek started his career at Sparta Prague. In July 2008 he was signed by Italian football club F.C. Internazionale Milano. In the next season he was promoted to the senior youth team – the Primavera under-20 team but only played 4 times in the league.
In January 2010 he was loaned to Sassuolo.
Jirásek played 11 out of possible 11 matches for its Primavera (literally "spring"), with 10 starts. (He was as sub against Grosseto).
That season the team composed with former Inter youth products, such as Mame Baba Thiam (forward) and Alberto Gallinetta (goalkeeper), who also returned to Inter. He was the midfielder of the team, or as a wing forward in his first appearance.
In 2010-2011 season Jirásek returned to Inter "spring" and made 20 appearances, 13 of them as starter.
The team also stick to the internal policy of changing the team to U-19 team with a few U20 player. (3 in 2010-2011 season) He shared the starting role with Andrea Romanò, or even played as an emergency left back or right wing forward. Jirásek was the starting midfielder in the play-off round, with the second round Fulvio Pea changed to use 4–4–2 formation.
Jirásek also made his Serie B debut in 2009-2010 Serie B, in the last round.
He substituted Giorgio Schiavini in the second half. Coach Stefano Pioli also brought Jirásek to the playoffs.
Jirásek wore no.5 shirt that season, which vacated by Sebastiano Girelli. Return to Sparta Prague
In July 2011 Jirásek returned to Sparta Prague on a three-year contract.
He was a player for Sparta Prague B (Reserve team).
On 3 November he made his first appearance in the A-team, replacing injured Václav Kadlec in the 8th minute. Loans to Senica and Teplice
In January 2013, he was sent by Sparta Prague on a one-year loan to FK Senica. In July 2014, he was sent by Sparta Prague on a one-year loan to FK Teplice.
International career
He received call-up from U-18 team in September 2009.
He also played for U19 in double friendly against Italy.
