Djokovic and Federer in final — Roger Federer had to survive four match points before beating compatriot Stanislas Wawrinka in the semifinals of the ATP World Tour Finals. Glyn Kirk/AFP/Getty Djokovic and Federer in final — Wawrinka was left to rue his missed chances as he went down in three sets to his Swiss rival. Justin Setterfield/Getty Images No.1 Djokovic marches on — A pumped up Novak Djokovic had to battle past Kei Nishikori in three sets at the 02 Arena to reach the ATP World Tour Finals title match. Leon Neal/AFP/Getty No.1 Djokovic marches on — Kei Nishikori unleashes a serve during his semifinal against Novak Djokovic at the ATP World Tour Finals. Glyn Kirk/AFP/Getty No.1 Djokovic marches on — Kei Nishikori was unable to repeat his shock U.S. Open victory over Djokovic in the ATP World Tour Finals but at least took the Serbian to three sets. Glyn Kirk/AFP/Getty Djokovic crowned No.1 — Djokovic had been crowned World No.1 for 2014 after his victory in the final group match over Tomas Berdych on Friday night. Clive Brunskill/Getty Images Djokovic and Federer in final — Federer has under 24 hours to recover from his epic semifinal against Wawrinka before facing Djokovic. Clive Brunskill/Getty Images Prev Next
