LOS ANGELES: Jayson Tatum scored 34 points, including a go-ahead basket with 33.7 seconds remaining on Saturday (Sunday in Manila) as the Boston Celtics escaped San Antonio with a 121-116 NBA victory over the tenacious Spurs.

While the Celtics followed up their dominant victory over the Dallas Mavericks on Thursday, the Mavs bounced back with a 127-117 victory over the New Orleans Pelicans with the help of a triple-double from Luka Doncic.

The Celtics improved their league-best record to 28-12 as they finished up a 2-2 road trip — but it looked harder than it needed to be against a rebuilding San Antonio squad.

Jaylen Brown added 29 points, and Malcom Brogdon scored 23 off the bench for the Celtics, who led by 11 midway through the fourth quarter.

The scrappy Spurs — who had 18 points apiece from Zach Collins, Tre Jones and Josh Richardson — tied it up at 116-116 on Richardson's three-pointer with 37.4 seconds remaining.

Tatum's step-back basket — off a pass from former Spur Derrick White — restored Boston's lead, and three Celtics free throws sealed it.

'There's obviously a lot of stuff tactically we can work on,' said Celtics coach Joe Mazzulla, who nevertheless insisted he was happy to see his team work through adversity to get the win.

Boston had opened their four-game road-trip with defeats at Denver and Oklahoma City before routing the Mavericks in Dallas on Thursday on the back of Tatum's second career triple-double.

In Dallas, Doncic rebounded from his seven-for-23 shooting performance against Boston with 34 points, 10 rebounds and 10 assists.

The Slovenian star notched his 55th career triple-double and his ninth this season, one behind the league-leading 10 of Denver's Nikola Jokic.