UPDATE 1-Tennis-ATP World Tour Finals men's singles round robin group B results

Nov 10 (Infostrada Sports) - Results from the ATP World Tour Finals Men's Singles Round Robin Group B matches on Saturday
RESULTS
Group B
4-David Ferrer (Spain) beat 8-Janko Tipsarevic (Serbia) 4-6 6-3 6-1
6-Juan Martin Del Potro (Argentina) beat 2-Roger Federer (Switzerland) 7-6(3) 4-6 6-3
STANDINGS
P W L F A Pts
Group A
1. Novak Djokovic 3 3 0 6 1 6
2. Andy Murray 3 2 1 5 3 4
3. Tomas Berdych 3 1 2 3 5 2
4. Jo-Wilfried Tsonga 3 0 3 1 6 0
Group B
1. Roger Federer 3 2 1 5 2 4
2. Juan Martin Del Potro 3 2 1 5 3 4
3. David Ferrer 3 2 1 4 4 4
4. Janko Tipsarevic 3 0 3 1 6 0