![Melbourne, Australia. 19th Jan, 2020. Alexander Zverev senior (l-r), Sergej Bubka junior and Alexander Zverev from Germany during a practice session at the 2020 Australian Open Grand Slam tennis tournament in Melbourne, Melbourne, Australia. 19th Jan, 2020. Alexander Zverev senior (l-r), Sergej Bubka junior and Alexander Zverev from Germany during a practice session at the 2020 Australian Open Grand Slam tennis tournament in Melbourne,](https://c8.alamy.com/comp/2ANT8AY/melbourne-australia-19th-jan-2020-alexander-zverev-senior-l-r-sergej-bubka-junior-and-alexander-zverev-from-germany-during-a-practice-session-at-the-2020-australian-open-grand-slam-tennis-tournament-in-melbourne-australia-frank-molteralamy-live-news-2ANT8AY.jpg)
Melbourne, Australia. 19th Jan, 2020. Alexander Zverev senior (l-r), Sergej Bubka junior and Alexander Zverev from Germany during a practice session at the 2020 Australian Open Grand Slam tennis tournament in Melbourne,
![Melbourne, Australia. 19th Jan, 2020. Sergej Bubka junior (l) puts sunscreen on Alexander Zverev from Germany before a practice session at the 2020 Australian Open Grand Slam tennis tournament in Melbourne, Australia. Melbourne, Australia. 19th Jan, 2020. Sergej Bubka junior (l) puts sunscreen on Alexander Zverev from Germany before a practice session at the 2020 Australian Open Grand Slam tennis tournament in Melbourne, Australia.](https://c8.alamy.com/comp/2ANT850/melbourne-australia-19th-jan-2020-sergej-bubka-junior-l-puts-sunscreen-on-alexander-zverev-from-germany-before-a-practice-session-at-the-2020-australian-open-grand-slam-tennis-tournament-in-melbourne-australia-frank-molteralamy-live-news-2ANT850.jpg)
Melbourne, Australia. 19th Jan, 2020. Sergej Bubka junior (l) puts sunscreen on Alexander Zverev from Germany before a practice session at the 2020 Australian Open Grand Slam tennis tournament in Melbourne, Australia.
![Sergei Bubka Jnr, son of pole vaulting great, seriously injured in fall from third floor of Paris apartment Sergei Bubka Jnr, son of pole vaulting great, seriously injured in fall from third floor of Paris apartment](https://www.telegraph.co.uk/multimedia/archive/02386/Sergei-Bubka_2386251b.jpg)