In this handout photo released by Tennis Australia, Serbia's Novak Djokovic reacts after the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465501
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465500
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic reacts after the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465452
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic reacts after the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465447
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic celebrates his victory at the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465443
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic celebrates his victory at the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465442
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic celebrates his victory at the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465439
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic celebrates his victory at the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465436
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev, left, and Serbia's Novak Djokovic shake hands after the singles semifinal tennis match at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465433
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465419
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic reacts during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465398
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev reacts during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465371
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465334
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465331
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465329
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev and Serbia's Novak Djokovic are seen during the singles semifinal tennis match against at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465327
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465324
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465323
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465322
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465321
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465320
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic puts on his t-shirt during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465318
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465306
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465305
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465278
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic returns a shot during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465272
In this handout photo released by Tennis Australia, Serbia's Novak Djokovic shows a thumbs-up during the singles semifinal tennis match against Russia's Aslan Karatsev at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465271
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev reacts during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465267
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev reacts during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465264
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465263
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465262
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465258
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465253
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev, left, and Serbia's Novak Djokovic pose ahead of the singles semifinal tennis match at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465251
In this handout photo released by Tennis Australia, Russia's Aslan Karatsev returns a shot during the singles semifinal tennis match against Serbia's Novak Djokovic at the Australian Open 2021 tennis championship in Melbourne, Australia. Editorial use only, no archive, no commercial use.18.02.2021#6465247
