By Rosangel Valenti, TW Contributing Editor
Good morning. This is your space for discussing the matches in Shanghai, as the Round Robin action begins, with Novak Djokovic to face Juan Martin Del Potro, and Nikolay Davydenko taking on Jo-Wilfried Tsonga.
Please also use this thread to comment on the final of the WTA Championships in Doha, between Venus Williams and Vera Zvonareva, both undefeated so far this week. Williams leads their head-to-head 5-1, including two victories in 2008; Zvonareva's only win came more than five years ago. Neither woman has won this title previously.
Please keep your comments focused on discussing the matches. Once they are over, it's acceptable to go mildly off-topic.
As always, enjoy the tennis.