LeBron James guaranteed Wednesday that his shooting woes will not continue in Game 4 of the NBA Finals. The reigning MVP is experiencing one of the worst postseason performances of his career following a 36-point loss to the San Antonio Spurs in Game 3.

James said he would be more aggressive and dismissed suggestions that his opponents disrupted his approach. He shot 7-of-21 from the floor and didn't attempt a free throw for only the second time in his entire postseason career as Miami suffered their worst playoff loss in team history, a 113-77 rout which puts them in a 2-1 deficit.

"As dark as it was last night, it can't get no darker than that, especially for me," James said Wednesday before the Heat's practice at the AT&T Center. "So I guarantee I'll be better for tomorrow (Game 4) for sure. I have to do whatever it takes. I mean, 7 for 21 isn't going to cut it. It's impossible for me to go 7 for 21, shoot 33 percent from the field and not have free throws. You have to figure out ways offensively that you can make an impact."

James acknowledged San Antonio's impressive defensive performance and how it has played a factor in disrupting his game. But he also believes he needs to be more aggressive and attack the basket more instead of waiting for open shots.

Through his first three games of this year's finals, James is shooting 38.9 percent and is averaging just 16.7 points, 12.3 rebounds, 7.3 assists and 2.0 turnovers.