During the 2005–06 season, Duncan suffered from plantar fasciitis for most of the season, which was at least partly responsible for his sinking output (18.6 points, 11.0 rebounds, 3.2 assists and 2.0 blocks per game), and also for his failure to make the All-NBA First Team after eight consecutive appearances. The big man came back strong in the 2006 NBA playoffs against the Dallas Mavericks, where he outscored rival power forward Dirk Nowitzki 32.2 to 27.1 points, with neither Nowitzki nor Mavericks center Erick Dampier able to stop Duncan with their man-to-man defense. But after splitting the first six games, Duncan became the tragic hero of his team in Game 7. Despite scoring 39 points in regulation time and fouling out both Dampier and Keith Van Horn, Duncan only made one of seven field goal attempts in overtime against Mavericks reserve center DeSagana Diop, and the Spurs lost Game 7.
