The Dallas Mavericks had a chance to lock up a Western Conference playoff spot with a win Friday night, but couldn’t put away the Houston Rockets in a 153-149 overtime defeat.

So Dallas will try to clinch a postseason berth Sunday night, and it could take the court at the Visa Athletic Center on Sunday already having done so if the Memphis Grizzlies lose their game earlier in the day.

The Mavericks face the Phoenix Suns, who got seeding games off to a good start Friday with a 125-112 win over the Washington Wizards.

The Mavericks (40-28) lamented losing a three-point lead on a free throw and tip-in of the missed second free throw with 3.3 seconds left in regulation against Houston. Coach Rick Carlisle said after the game that the loss was “about as tough as it gets, and it just comes down to basic execution.”

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