The ATP announced the line ups of singles and doubles play of the World Tour Finals beginning today in London .
Singles – Group A
[1] N Djokovic (SRB)
[3] A Murray (GBR)
[5] T Berdych (CZE)
[7] J-W Tsonga (FRA)
Singles – Group B
[2] R Federer (SUI)
[4] D Ferrer (ESP)
[6] J M del Potro (ARG)
[8] J Tipsarevic (SRB)
Doubles – Group A
[1] B Bryan ( USA )/M Bryan ( USA )
[3] L Paes ( IND )/R Stepanek (CZE)
[6] M Granollers (ESP)/M Lopez (ESP)
[7] A Qureshi (PAK)/J-J Rojer (NED)
Doubles – Group B
[2] M Mirnyi (BLR)/D Nestor (CAN)
[4] R Lindstedt (SWE)/H Tecau (ROU)
[5] M Bhupathi ( IND )/R Bopanna ( IND )
[8] J Marray (GBR)/F Nielsen (DEN)