Germany's Hartmann group has said no agreement has yet been reached for the sale of four boxships linked to Greek owner Contships Management.

The TradeWinds weekly reported on Friday that the Athens-based company was closing in on the 1,114-teu sisterships Frisia Aller, Frisia Iller and Frisia Alster (all built 2007), and the Frisia Inn (built 2008).