Djakpa has become a regular starter at the back for Frankfurt this season, putting himself into the picture for a place in Ivory Coast's squad for the Brazil tournament.
"Africa is going crazy about the World Cup, but that's not something I'm thinking about. The only thing on my mind is playing for Frankfurt. I just need to concentrate on my job here," the 27-year-old told the Bundesliga's official website.
Constant has won five caps for Ivory Coast since making his debut in 2007.