What I don't like about the Spurs vs. Dallas matchup is our lack of perimeter defense. Dallas has many players that like to break down defenses by driving ... Harris, Terry, Dirk, Howard, Stackhouse. All those guys can put pressure on our defense and usually break it down, either creating scoring opportunities or putting key players in foul trouble.
We can only really counter with three reasonably good perimeter defenders in Parker, Bowen and Manu. That's five threats vs. three and this creates big problems. When the Spurs D breaks down on the perimiter, the last line of defense is the interior D and since David's retirement and Horry's precipitous decline, our interior D has been soft at best. Relying on Elson to be a shotblocker in crunch time during playoff games is risky to say the least and he still isn't comfortable with the system.
I'd also say our lack of rebounding that's carried over from last year is equally deadly against a team like Dallas that likes to crash the boards. You just can't afford to give such an efficient offensive team like that second chances. It's suicide. If I'm not mistaken, the Mavs have not lost a contest this year when they've outrebounded their opponents.
Avery knows the Spurs system better than any other opposing coach and he exploits the weaknesses in our personnel very efficiently. Unless we can address these two key areas (perimeter defense, rebounding) we are going to be at a disadvantage in a series against the Mavs.