The leading players in the world gather for the official ATP photograph ahead of the Tennis Masters Cup in Shanghai - but travel arrangements mean Andy Roddick misses out this time

Argentina's Juan Martin del Potro is one of four players making their debut at the season-ending event

Novak Djokovic is Del Potro's opponent in the opening match and is looking for his first Masters Cup victory

Del Potro has been struggling with a split toe nail in recent weeks and just falls short in a tight opening match

Djokovic comes through 7-5 6-3 to seal his first Masters Cup win after three defeats last year

France's Jo-Wilfried Tsonga takes the initiative against Nikolay Davydenko in the second match of the day

But the experienced Davydenko works his way back into the match from a set and a break down

Tsonga sees a dramatic match slipping from his grasp as he is taken to a final set tie-break

Davydenko holds his nerve to dominate the tie-break and join Djokovic at the top of the Gold Group