Official website of Sparta reported on parting with Stramachtoni.
The Italian topped Sparta last summer. He was supposed to compete for the title with Slavia and Victoria Plzen, but instead the Prajans now lag behind leading Pilsen by 14 points.
"Sparta fired head coach Andrea Stramaccioni after the disappointing start of the second part of the season and the generally poor results of the current campaign," says the club's statement.
At the Italian Sparta, who played the last two matches with the outsiders, held 19 matches: 9 wins, 6 draws and 4 losses.
Technical manager Leonidas Volokos, assistant coaches Roberto Muzzi and Omar Danesi, fitness trainers Federico Pannoncini and Stefano Campari, as well as analyst Vincenzo Sasso were also fired.
The club wished Stemaccioi luck in his future career.
So far, Andrea unsuccessfully coached Inter, Udinese and Panathinaikos.