Oklahoma City actually held an edge at the end of the first quarter, with Adams playing his part in the fast start. After coming into the game midway through the period the centre made an immediate impact with a two-hand put-back dunk, before showing power to score on a one-hand slam and finesse to finish a mid-range hook shot.
But, with Adams' seven first-quarter points the second-most on the Thunder behind Kevin Durant, the signs weren't promising for the visitors to level up the series.
San Antonio quickly seized control in the second quarter and, for the next 24 minutes, outscored their opponents 67-36. That offensive outburst rendered the final period irrelevant, leaving coach Scott Brooks to sit Kevin Durant and Russell Westbrook as the Thunder turned their attentions to game three.
Oklahoma City's All Star pair managed only 30 points combined in the defeat, while Tony Parker led the Spurs with 22 as his side put five players in double digits.