MIAMI -- LeBron James and Serge Ibaka were both on the NBA's All-Defensive Team this season, but Ibaka is not impressed with James' skills on that end of the court.

Ibaka, the Oklahoma City Thunder's power forward, said Monday that James was "not a good defender" and that "he can play defense for two or three minutes but not 48 minutes." James responded to the comments before Tuesday's Game 4 of the NBA Finals.

"I don't really care what he says, he's stupid," James said. "Everyone says something to me every series, then (the media) tries to get a quote. It's stupid."

Ibaka made the comments to The Palm Beach Post.

"LeBron can't play (Kevin Durant) one-on-one. They're playing good defense like a team," Ibaka told the newspaper.

In addition to the Finals, James and Ibaka likely will face off this summer at the Olympics. Ibaka plays for the Spanish national team, expected to be the most serious challenger to Team USA's bid to repeat as gold medalists.