The Wizards, at 4-27, have not won consecutive games this season. They dropped an overtime decision Friday to the Brooklyn Nets, 115-113.
Meanwhile, the Heat's last two wins have each come in overtime: a Dec. 31 112-110 win against the Orland Magic, and a 119-109 victory over the Dallas Mavericks on Wednesday. Their record now stands at 22-9.
The Wizards, who are last in the NBA with an average of 89.5 points per game, got 24 points from rookie Bradley Beal in 48 minutes of Friday's overtime loss. Jordan Crawford had 23 for Washington.
After scoring 32 points against the Chicago Bulls on Friday, LeBron James has now scored at least 20 points in every game this season, 36 consecutive regular-season games dating back to last year and 52 games counting last season's playoffs. The last game in which James scored fewer than 20 points was April 13, 2012. That night, he had 19 points in a home win over the Charlotte Bobcats.
The game will be televised locally in Miami on Sun Sports at 6 p.m. ET.