The Western Conference Finals is now tied 2-2 after the Oklahoma City Thunder defeated the San Antonio Spurs in game four by a score of 105-92.

The home team is 4-0 in this series and the games haven't even been close as only one game was decided by single digits, game three. Russell Westbrook completely took over game four with his 40 points and 10 assists, and the Spurs simply had no answer. The Spurs didn't even play their starters in the fourth quarter.

Once again, Serge Ibaka made a huge difference in the paint against Tim Duncan and Tiago Splitter. The Spurs were only able to score 36 points in the paint, a far cry from the 66 they scored without Ibaka in game one. This looks very similar to 2012, when the Spurs held a 2-0 series lead and lost the next four consecutive games to the Thunder.

This season, the Spurs are 0-6 against the Thunder with Serge Ibaka and have not beaten the Thunder in Oklahoma City in their last nine attempts.

But, there's some good news for the Spurs. They're 8-1 at home this postseason and they still have two potential home games left. With the series tied 2-2, it's a best two out of three series going forward. Game 5 will be played in San Antonio Thursday night at 9:00 EST on TNT.

Russell Westbrook has proven to be a huge problem for Tony Parker multiple times. The Spurs didn't even shoot a single free throw until midway through the second quarter. Ibaka is the ultimate rim protector for the Thunder and changes the entire game for Kevin Durant, who isn't a great defender.

Coach Gregg Popovich has now put all of his eggs into the game five basket at home in San Antonio. If the Spurs lose that game, they must then win two consecutive games in order to win the series. Tell us what you think in our poll below. How much trouble are the Spurs in headng forward in this series against the Thunder?