This is exactly why the WWE tells kids not to try this at home.
On last weeks "RAW", superstar John Cena got his nose busted by a knee to the face from current champion Seth Rollins. After the match, which Cena won, you could see him being attended to by a doctor or at least a guy thats supposed to be a doctor.
This apparently was no wrestling stunt, WWE physician Steve Daquino said "we sent him over to the local emergency room so he can be evaluated by the ears, nose and throat doctor who’s on call … and see what can be done to properly repair it.”
According to Wrestlezone.com, John Cena had emergency surgery to correct breathing issues, and future surgeries may also be required to reconstruct his nose.
See video here
https://youtu.be/7-4tXeCE7w0