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Fortunately, the Spurs haven't had any long-term struggles; otherwise, they wouldn't be sitting on a 3-0 lead against the Portland Trail Blazers. That said, they haven't been completely flawless throughout the playoffs.
Evident against the Mavs, the Spurs found their fair share of defensive issues when it came to guarding Monta Ellis, Devin Harris and other perimeter threats. Dallas penetrated with ease and exploited holes that hindered San Antonio out of the gate.
However, as seen against the Blazers, San Antonio has managed to clean up its act defensively. Similarly, rebounding questions—especially ones regarding the team's inability to keep the opposition off the offensive boards—were frequent at first, although the Spurs have redeemed themselves by going toe-to-toe with Portland in each contest thus far.
Aside from the issues that manifested themselves against Dallas, San Antonio has shown irregular weaknesses during their second series. Their shoddy free-throw shooting in Game 1 was noteworthy, though that was corrected in the subsequent games, with a perfect 25-of-25 performance in the third contest.
Deviating from the ephemeral slumps that the team has endured thus far, individual players haven't been on point from start to finish. Tony Parker's second-half production against the Mavericks was less than impressive, while Marco Belinelli served as a benchwarmer throughout the opening series as well as during a game against the Blazers.
Even key players like Manu Ginobili haven't been perfect, evidenced by his 0-of-6, two-point performance in Game 1 of the Western Conference semifinals.
Still, each issue has been short-lived and corrected, thus ensuring that the team isn't plagued by any long-term weaknesses that could eventually lead to its demise. Instead, several small things constitute San Antonio's struggles thus far, and as long as they remain addressed as they arise, the Spurs should continue to roll.