The Greek club Aris says it has signed Mexican forward Nery Castillo on a six-month loan, ending his brief stint at Major League Soccer's Chicago Fire.

The club said Wednesday it reached the loan deal with Ukrainian club Shakhtar Donetsk, where the 26-year-old is still contracted.

Castillo played seven seasons as a youngster at Greek club Olympiakos before moving to Shaktar, where he has spent much of his time on loan at other clubs, including Manchester City in 2008.

Aris announced the deal Wednesday, a day after respected Argentine coach Hector Cuper resigned following a string of poor league results.

Aris is eighth in the league with 23 points from 18 matches, and hosts City in the Europa League on Feb. 15.