![2009 Promotional photo for the ATP World Tour Finals. Back left to right: Juan Martin Del Potro (Argentina), Novak Djokovi… | Tennis champion, Roger federer, Tennis 2009 Promotional photo for the ATP World Tour Finals. Back left to right: Juan Martin Del Potro (Argentina), Novak Djokovi… | Tennis champion, Roger federer, Tennis](https://i.pinimg.com/originals/35/50/58/355058c04737450547fc70c4b5c093a2.jpg)
2009 Promotional photo for the ATP World Tour Finals. Back left to right: Juan Martin Del Potro (Argentina), Novak Djokovi… | Tennis champion, Roger federer, Tennis
![Robin Sonderling of Sweden reacts after defeating Rafal Nadal of Spain in their ATP World Tour Finals tennis match at the O2 Arena in London, Monday, Nov. 23, 2009 . Sonderling won Robin Sonderling of Sweden reacts after defeating Rafal Nadal of Spain in their ATP World Tour Finals tennis match at the O2 Arena in London, Monday, Nov. 23, 2009 . Sonderling won](https://c8.alamy.com/comp/2P7R7R4/robin-sonderling-of-sweden-reacts-after-defeating-rafal-nadal-of-spain-in-their-atp-world-tour-finals-tennis-match-at-the-o2-arena-in-london-monday-nov-23-2009-sonderling-won-the-match-6-4-6-4-ap-photoalastair-grant-2P7R7R4.jpg)
Robin Sonderling of Sweden reacts after defeating Rafal Nadal of Spain in their ATP World Tour Finals tennis match at the O2 Arena in London, Monday, Nov. 23, 2009 . Sonderling won
![💜 Lynn⁷⁼¹ 🔍⍤⃝🔎 on X: "RT @TheTennisTalker: 2009 ATP Finals. Look how young they are 🤗 Verdasco 🇪🇸 Del Potro 🇦🇷 Djokovic 🇷🇸 Federer 🇨🇭 Nadal 🇪🇸 Murray 🇬🇧…" / X 💜 Lynn⁷⁼¹ 🔍⍤⃝🔎 on X: "RT @TheTennisTalker: 2009 ATP Finals. Look how young they are 🤗 Verdasco 🇪🇸 Del Potro 🇦🇷 Djokovic 🇷🇸 Federer 🇨🇭 Nadal 🇪🇸 Murray 🇬🇧…" / X](https://pbs.twimg.com/media/FAkeGSdWYAMO28Q.jpg)