This is Liam Hemsworth.

Morning! It's Monday. 6am. And I'm standing in the rain. Gonna be a good week!

A post shared by Liam Hemsworth (@liamhemsworth) on Jul 24, 2017 at 3:08am PDT

He's the actor in 'The Last Song', 'The Hunger Games' and 'Independence Day: Resurgence'.

Lionsgate Films

This is Liam Hemsworth hugging Rafael Nadal, after playing a gruelling match at the 2018 U.S. Open. 

Instagram

Oh wait, that's...not...Liam Hemsworth. Or is he?

via GIPHY

Tennis fans across the world and millions of others watching the U.S. Open, were in for a shock when they saw Rafael Nadal's opponent, Karen Khachanov for his striking resemblance to the actor. 

We've had a great run here in Toronto at @rogerscup. Thank you everyone for your support. It meant a lot to me.Next stop- @cincytennis ðð» // ХоÑоÑÐ°Ñ Ð½ÐµÐ´ÐµÐ»Ñ Ð² ТоÑонÑо @rogerscup .СпаÑибо болÑÑое вÑем за ÑообÑÐµÐ½Ð¸Ñ Ð¸ поддеÑжкÑ.ЭÑо оÑÐµÐ½Ñ Ð¼Ð½Ð¾Ð³Ð¾ Ð´Ð»Ñ Ð¼ÐµÐ½Ñ Ð·Ð½Ð°ÑиÑ.СледÑÑÑий ÑÑÑниÑ- @cincytennis ðð» #Toronto #ATP1000 #TeamKhacha

A post shared by Karen Khachanov (@karenkhachanov) on Aug 13, 2018 at 1:22pm PDT

Honestly, unless I see both Liam and Karen together in a room, I refuse to believe that they are two different people. But then I stumbled upon Karen's Instagram and my mind was blown. 

What's up Torontoð¨ð¦ð¥âð»ðð»ðð» @rogerscup #Toronto #ATP1000 #USopenSeries

A post shared by Karen Khachanov (@karenkhachanov) on Aug 5, 2018 at 3:42pm PDT

The 22-year-old is a Russian professional Tennis player of Armenian descent. He has won 2 ATP singles titles and is currently ranked world no. 25 (singles). 

Last day in Biarritz before going to Moscow ðâð»âï¸

A post shared by Karen Khachanov (@karenkhachanov) on Jul 13, 2018 at 2:14am PDT

We guess the Hemsworth clan should gear up to welcome the 4th brother in their family of insane hot genes. Well, we aren't suggesting this. Karen jokingly called himself the "4th brother" when someone asked him if he is related to Liam. 

Yeah I am the 4th brotherð¤ð¤« https://t.co/I5pG9vjixY

Although Khachanov lost the match to Nadal, he left the court with the tag of a heartthrob, and while we don't know about any prize money, he's definitely hit the genetic jackpot.