Miami Heat guard Dwyane Wade believes there is plenty more to come from teammate LeBron James next season.

James won his third MVP award, as well as his first NBA championship last season; he also became the first person since Michael Jordan to win the MVP, NBA championship as well as Olympic gold, after James led the U.S. to victory in London.

"The sky's the limit," Wade told ESPNChicago.com after a promotional appearance for his new book, "A Father First". "He's been very good.

"He has three MVPs. I don't know statistically how much more he can do, but I think just his dominance of a game and starting to really understand everything about the game now. It's starting to all come together. That's the scary part.

"It's here. This is the time," Wade said. "(He's) 27, you won a championship, you had success, it's not going to go anywhere.

"You can see him now taking that next step to that next elite level. I thought he proved it this whole season. I thought he was dominant from Game 1 all the way until the end, and he proved that that's not easy to do and there's not many that have ever done it."

Wade said he has no problems with James working out with Oklahoma City Thunder's Kevin Durant this offseason, after the duo did the same last offseason.

"They worked out last summer, they've got a great relationship," Wade added. "It's just two of the best players taking things from each other, in a sense, and seeing the other person's work ethic so they push each other to be good, and I think on the other end it's LeBron being kind of the veteran in the sense that KD is the future of this game as well.

"He's not afraid to say, 'Listen, let's go work out in the gym together. Let's make each other better.' It's a good thing."

Meanwhile, both James and Durant tweeted after their work outs. "Just finished a great workout with @KDTrey5. On court work, ran the hill and finished running the football field. #StriveforGreatness," James wrote on his account.

"I got better today! That's all that matters!! Move em," Durant added on his account.