[duong]

Djokovic-Berdych will be the afternoon session.

1. if Djokovic defeats Berdych in 2 sets, Djokovic will be number 1 of the group, Berdych will be out, Tsonga will need to defeat Murray in 2 to take him the number 2 seat.

2. if Djokovic defeats Berdych in 3 sets, Djokovic will be number 1 of the group, Tsonga will be out, Berdych will have to hope Tsonga wins in 2 to take Murray out.

3. if Berdych defeats Djokovic in 3 sets, Djokovic will be through, Tsonga will be out, Berdych will have to hope Tsonga wins (whatever the number of sets) to take Murray out. If so, Berdych would be number 1, Djokovic number 2 ; else Djokovic number 1, Murray number 2.

4. if Berdych defeats Djokovic in 2 sets, Berdych will be through, Tsonga will be out, Murray will have to defeat Tsonga in 2 sets to take the second qualifying seat from Djokovic. If so Murray would be number 1, Berdych number 2. If not, Berdych would be number 1, Djokovic number 2.