He's got no opponent yet ... but Canelo Alvarez has returned to his boxing gym to start training -- while his promoter Oscar De La Hoya is now turning up the heat on Gennady Golovkin.
Remember, Oscar said the GGG train had left the station because Gennady's team refused to budge from their negotiating terms ... they wanted a 50/50 revenue split.
Oscar said that wouldn't happen ... and told the media Canelo was now focusing on trying to make a deal with other fighters, including Daniel Jacobs.