The 29-year-old is a free agent having left Greek Super League side Atromitos in December.
Middlesbrough could be without Leroy Lita for the remainder of the season after he tore a hamstring in Saturday's 0-0 draw at Portsmouth.
Hamstrung: Boro striker Leroy Lita could be out for the rest of the season
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Source: Daily Mail
Source: Daily Mail