Ondrej Celustka joins Sunderland
Sunderland have signed Ondrej Celustka on a season-long loan.
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The 24-year-old Czech has joined the Black Cats from Turkish side Trabzonspor.
Celustka started his career with FC Tescoma Zlin before moving to Slavia Prague, for whom he made 41 appearances.
A short spell with Palermo followed before he headed to Turkey, while he represented his country at the 2011 Under-21 European Championships.