Complex sentence: On the week of May 14-May 21,2005, at the age of 17, Pironkova played in her 1st WTA level tournament, playing in the Tier III event in Istanbul, Turkey.
Split into simpler sentences: On the week of May 14-May 21,2005, at the age of 17, Pironkova played in her first WTA level tournament. This was the Tier III event in Istanbul, Turkey.