The Tractor Boys had initially agreed to a loan deal with an option to purchase Broja from Chelsea.
However, the deal has since stalled, which means that other targets are being considered.
According to Niewsblad Sport, Denkey is someone that Ipswich admire a great deal.
The 23-year-old Togo international is attracting interest from Lille and Real Sociedad as well.
His club are said to be seeking a minimum fee of £12.7 million, with a preference for £16.9 million.