By Miguel Rivera

IBF/IBO/WBA/WBC middleweight champion Gennady Golovkin (36-0, 33KOs) is not confident that he'll be fighting Saul 'Canelo' Alvarez (48-1-1, 34KOs) next September.

Golovkin says the biggest obstacle in making that fight is not the weight, but the money. Golden Boy Promotions, on behalf of Canelo, offered Golovkin a flat fee [reportedly a sum of $10 million] - but the middleweight king is standing firm on his demand to receive a fair percentage split of the revenue.

"I do not know if the fight with Canelo is possible, one of the problems is the money. What they offer is a problem," said Golovkin. "I have no problem to fight, it can be done anytime. I'm ready to step into the ring at any time. I don't know if Canelo is ready. You have to go and ask him  I hope the fight happens next year. My next fight could be with him - no problem and [we can do it] anywhere. I'm ready right now, but the problem is with his team."

Abel Sanchez, who trains Golovkin, says Golden Boy's offer was ridiculous.

"It is difficult to negotiate this fight. They did make an offer, but their offer was ridiculous. Tom Loeffler [who promotes Golovkin] is talking with [Golden Boy CEO] Oscar de la Hoya to see if it can happen in September. However, for that to happen both sides must agree [on the money]."

Canelo is planning to return in 2017, either in February or in May during Cinco De Mayo weekend. Last month he dropped to 154-pounds and knocked out Liam Smith for the WBO championship.

Golovkin also fought last month, heading to the UK to stop IBF welterweight champion Kell Brook in five rounds. His next contest is potentially against his WBA mandatory challenger Daniel Jacobs, and that fight is being targeted for a date in late February or early March.