raced through the first set, breaking Tsonga twice to a 6–1 win. The second set was closer, as both players were holding their service games until 5–6, when Djokovic, serving for a tie-break, found himself led, then broken by Tsonga, who levelled the match to one-set-all. In the final set, Tsonga increased his game level breaking Djokovic twice to win the last set, ending the match on the score of 1–6, 7–5, 6–1, to improve his head-to-head record against the Serb to 3–1, and score his first career Masters Cup win. The second match, set to decide of the third semifinalist after Djokovic and Murray, was the third career meeting of Nikolay Davydenko and Juan Martín del Potro. The Russian broke del Potro early in the first set, leading 4–1 at a point, when the Argentinian took back Davydenko's serve, seemingly getting back into the match. The fourth seed, though, did not let del Potro complete his comeback, and broke him again, eventually taking the set 6–4. Davydenko's momentum took him through the second set, where he converted each of the two break points obtained, to close the match 6–4, 6–2 after less than an-hour and a half of play. The result eliminated del Potro, and allowed Davydenko to qualify for his second semifinal in four season-ending events appearances, after 2005. Day 6 In the first of the last two doubles round robin matches, within the Gold Group, on November 14, Daniel Nestor and Nenad Zimonjić, already qualified to meet Cuevas and Horna in the semifinals, faced already eliminated Lukáš Dlouhý and Leander Paes, in a dead rubber. The second seeds did not leave many opportunities to the US Open runners-up Dlouhý and Paes, breaking them twice in the first, and once in the second set, saving all break points against themselves, to cruise to a 6–1, 6–4 win, and leave the round robin stage as the only undefeated team. In the second match –to decide of the last doubles qualifiers–, Mariusz Fyrstenberg and Marcin Matkowski defeated Jonas Björkman and Kevin Ullyett, to enter the last four, setting a semifinal meeting with Bob and Mike Bryan. The first two sets were each dominated by one of the teams, with the Poles breaking twice to win the first, and Björkman and Ullyett doing the same to win the second, before Fyrstenberg and Matkowski eventually took the advantage in the deciding match