The Dream led by as many as 28 points in the second half before the Shock cut the lead to 10 late in the fourth quarter. Shoni Schimmel (13 points, nine assists) nailed a 3-pointer with 1:53 to play that stopped the Shock's momentum and gave Atlanta an 88-75 lead.
For the second straight game, the Dream took control with a dominating second quarter. Atlanta outscored Tulsa 24-6 to build a 47-25 halftime advantage. The Shock shot 3 for 15 from the floor and missed their final eight shots en route to a season low in scoring for a quarter.
Despite facing league rebounding leader Courtney Paris, who finished with 12 rebounds, Atlanta owned a 48-34 rebounding edge.
The Dream finish the regular season at Connecticut on Sunday and will host Game 1 of the Eastern Conference semifinals on either Aug. 21 or 22.
Before the game, the Dream announced a multiyear contract extension with Lyttle, who has spent the last six seasons of her 10-year career with Atlanta.