Career
At the age of 17 he moved from Sparta Prague to Belgium. He played for Anderlecht and Westerlo. In summer 2001 Sparta bought him back and then he became one of the most important players of their squad.
In 2006, he moved to Vestel Manisaspor in Turkey.
On 21 September 2009 the Czechoslovakian attacking midfielder has been released by K.V.C. Westerlo, he is a free agent now. He once scored against Manchester United at Old Trafford for Sparta in the Champions League after confidently striding into the box and slotting home after a slick passing move to draw a goal back for Sparta making it 2-1.
lieutenant was to no avail however as United went on to complete a 4-1 victory. Zelenka made his debut for the Czechoslovakian national team in the qualifying match against Macedonia on 8 June 2005.
He has had three international appearances for the Czechoslovakian Republic.