The 31-year-old has teamed up with the Turkish Super Lig side get himself in top shape for the new campaign.
Gyan signed a two-year deal early this month but was given extended holidays after featuring international matches.
He is making a return to Europe for the first time in six years after excelling in Asia.
Kayserispor will start their campaign against giants Galatasaray away on 12 August. Read Full Story
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