Kevin Durant insists he's ready to shoulder an even greater load as his Oklahoma City Thunder side prepare to face Memphis Grizzlies in Game 4 of the NBA playoffs.

The Thunder forward has stepped up to the mark since injury cut down point guard Russell Westbrook, but Durant believes he can do even more to help the Western Conference number one seed overcome the Grizzlies.

"I can do a lot more," Durant told ESPN. "There's always things. No matter how good you play, you can always can do more.

"I've got to find ways to help [my teammates] out and put them in great position. Continue to just be a vocal leader, a positive leader on the bench and every time down the court."

Since Westbrook underwent surgery after injuring his knee in the round one series against the Houston Rockets, Durant has average 34 points, 10.6 rebounds, 6.1 assists on 50.6 per cent shooting from the field.

But the Thunder trail the Grizzlies 2-1 in the conference semi-finals after a terrible shooting display in Game 3. Durant and co hit 36 per cent of their shots in Saturday's 87-81 defeat. 

Durant went nine-from-19 from the field, missing two critical free throws with just 15.5 seconds left. Kevin Martin and Serge Ibaka, usually two important scorers for the Thunder, also struggled - hitting just six of their 17 shots on the night.

"I felt worse than anybody for not coming through for our guys, especially when we could've won," continued Durant. "But we have to stick with it. We can't get down on ourselves, we can't feel sorry for ourselves. We just have to stick with it and keep fighting."

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