NBA Power Rankings 2018: Oklahoma City Thunder move into top 5

Toronto still holds the league's best overall record at 13-4. However, they've shown their issues in recent losses, some of which fans and analysts may not have expected. The Raptors are 7-3 over their last 10. They also held up pretty strong against the Celtics on the road, showing they are likely to give Boston quite a matchup if they meet in the playoffs.

People expected Greek Freak and the Bucks to be good this season, but this good? They're currently considered second-best in the league behind the Raptors and hold a win against that No. 1 team. As of right now, Milwaukee is 11-4 overall and has a better record than the Golden State Warriors. Still, they lost to those Warriors by 20-plus at home. Time will tell if this is the No. 2 team but they're leading the NBA in points differential with about 11 more scored than opponents.

The reigning NBA champions had a tough week last week with a heated incident between players and injuries. They're on a three-game losing streak and just 5-5 over their last 10 games. However, returns for Steph Curry, Draymond Green, and eventually DeMarcus Cousins should give them a boost.

OKC has surged into the top five after being previously ranked at No. 10, per ESPN. Their recent success is largely in part to Paul George's contributions. He's averaged 27.8 points, 10 rebounds, and five assists per game over his last five games. That's huge, especially when Russell Westbrook is sidelined.

Portland was among the quietest of the top five teams due to the fact the Western Conference team ahead of them is making all sorts of noise. Still, Damian Lillard, CJ McCollum, Jusuf Nurkic and company are looking good. They're also now the No. 1 team in the West standings.