4-4 Davydenko made his move on Del Potro's service. Two blistering passing shots set up three break points and he claimed a 5-4 lead after a long rally. Serving for the title, he set up match point with an ace and took it when Del Potro could not return a fiece smash. It capped a week of surprises at the new venue with world number two Rafael Nadal crashing out with three straight sets defeats and home hope Andy Murray edged out of the round-robin by Federer and Del Potro by the slimmest of margins. Soderling, who only came into the tournament as a late reserve for the injured Andy Roddick, and Davydenko were the surprise qualifiers from the other group, with the latter going all the way after beating the Australian, French, U.S. Open and Wimbledon champions. Del Potro acknowledged he had been beaten by the better man on the day. Congratulations. You are a great champion, he said. Now Davydenko will eye his first grand slam title at the Australian Open in January, which will be the next major tournament test for the leading players. Earlier, In the doubles final, American pair Bob and Mike Bryan beat Max Mirnyi and Andy Ram 7-6 6-3 to win their third ATP Finals title and claim the number one ranking in the world at the end of the season for the fifth time.