After a less-than-exciting first round in the playoffs, NBA fans can look forward, finally, to sinking their teeth into an epic Spurs-Thunder matchup in round two. OKC’s Kevin Durant and Russell Westbrook are two of the best offensive talents in the game, and they’re facing down a 67-win Spurs team with a historically great defense.YEARTEAMRELATIVE DEFENSE11964Celtics+10.821965Celtics+9.532004Spurs+8.842008Celtics+8.651963Celtics+8.561962Celtics+8.571993Knicks+8.381994Knicks+8.191961Celtics+7.6101962Lakers+7.6112004Pistons+7.5122016Spurs+7.4Best defensive rating relative to NBA average, single seasons since 1950-51Defensive rating is points allowed per 100 possessionsSource: BASKETBALL-REFERENCEIn terms of points allowed per 100 possessions, San Antonio gave up just 99.0, which was 12th-best in NBA history and 7.4 points better than the league average.