The Oklahoman's Oklahoma City Thunder beat writer Darnell Mayberry answered questions from readers in today's Power Lunch chat. Read the entire chat recap here. Participate in our Power Lunch chats Monday-Friday at 11 a.m. at NewsOK.com/sports On the importance of each team's bench in the Thunder-Mavericks series: The team with the better bench has decided each game. Dallas' bench outscored the Thunder's in Games 1 and 3. The Thunder's reserves won the battle of the benches in Game 2. The problem now is Brooks is shortening his bench, so there's almost no way for the Thunder's reserves to make as much of an impact as they did in Game 2. Eric Maynor didn't play in the second half. So that leaves Harden, Collison and Cook to do all the heavy lifting. And that means most of the bench scoring has to come from Harden, while Cook and Collison contribute between six and 10 points each. That's putting a lot of pressure on the starters to play extremely well. They have to be up for the challenge. On why Kevin Durant isn't posting up more against Dallas: Two reasons. Durant is getting doubled on his catches. So it's not conducive for him scoring anyway. You could say he then should be passing out and making easy plays for teammates, but the Mavs are swarming to the ball and cutting off kick outs. It would help if the Thunder had Harden and Cook on the floor with KD so when he posted up and got doubled there would be some shooters to make the Mavs pay. But KD also needs to pass out quicker to put pressure on the D. The second reason is KD is getting played extremely physically in the post, even when it's guys like Kidd guarding him. (Side note: Kidd can push and lean on KD in the post but no one can do that to Dirk at the other end. Go figure.) So KD's got to make himself a better target for an entry pass. There are a lot of possessions where Westbrook can't even get it to KD in the post out of fear of turning it over. On Thabo Sefolosha's future with the Thunder: Because of his skills and his cap-friendly contract, Sefolosha will be around for a while. He can basically get it done on call defensively, and that's something every team needs. Even if (when) he becomes a reserve next season, he'll still have value as the Thunder seeks to try to continue its stated goal of being a defensive-minded organization. On Serge Ibaka's play against the Mavericks: I don't think he's still hurt. I think he's playing against a guy named Dirk. He makes a lot of people look bad. That matchup is the exact opposite of what Serge does well. He's not a good man defender. He's a great weak side defender. The proof is shown in this series by his one block-per-game average.