Fedor Emelianenko and Dan Henderson are on board to square off in a proposed late July bout on Showtime, sources from both fighters’ camps told SI.com on Saturday.

Strikeforce officials said discussions for the summer blockbuster bout are under way, but that many details, including what weight the headliner will be contested at, as well as the date and venue, still need to be ironed out before the deal can be signed. Talks are expected to pick up speed next week, according to sources.

Multiple sources have said that Emelianenko and his M-1 Global management team are proposing a catchweight bout between 215-220 pounds to make the match more appealing for Henderson. However, sources within Henderson’s camp indicated the Strikeforce light heavyweight champion wishes to meet the former Pride Fighting Championships kingpin at heavyweight.

The event would be a co-branded venture between Strikeforce and M-1 Global, who have an agreement through Showtime to share promotional rights for events that the Russian legend headlines.

Source: Sports Illustrated