The first half of the NBA's 2013-14 season contained no shortage of surprises, both positive and negative.
It didn't take long for the madness to commence. After beating the Chicago Bulls on opening night, the defending champion Miami Heat fell to the "tanking" Philadelphia 76ers one night later, although both teams have since regressed to the mean.
Unpredictability even spread outside the U.S., as the Toronto Raptors substantially improved after trading their highest-paid player to the Sacramento Kings in December.
Halfway into the season, the legitimate championship contenders are creating separation from the pretenders. Meanwhile, the race to the top of the lottery will only heat up from this point forward, once more teams decide to bottom out.
Let's look back on 12 of the biggest winners and losers from the first half of the 2013-14 season, based on how they've fared compared to their preseason expectations.
All advanced statistics, unless otherwise noted, come from Basketball-Reference. All statistics and records are current through games played on Jan. 19.