The 25-year-old cricketer was struck by a bouncer bowled by NSW quick Sean Abbott while playing for South Australia at the SCG.
Hughes was rushed to St.Vincent's Hospital and his condition is currently listed as critical.
The amount of tributes and messages written about Hughes has seen the batsman trend worldwide on Twitter.
Our thoughts and prayers are with phil and his family! He is a great fighter and a great young man!
— Darren Lehmann (@darren_lehmann) November 25, 2014
Feeling for Phil Hughes after being hit. He is not in a good way! Stay strong @seanabbott77 .. Not your fault young man. #BupaSS #NSWvSA
— Dean Jones (@ProfDeano) November 25, 2014
Thinking of you mate! Hope everything is ok with u Hughesy
— Mitchell Johnson (@MitchJohnson398) November 25, 2014
Phil Hughes struck a fearful blow to the head at the SCG and now in hospital,our thoughts with family.
— Ken Sutcliffe (@Ken_Sutcliffe) November 25, 2014
Sad to hear about Phil Hughes, thoughts are with him and his family
— Meg Lanning (@meglanning7) November 25, 2014
Thoughts are with Phil Hughes and his family.
— Nathan Bracken (@NBRACKEN142) November 25, 2014
Thoughts are with Phil Hughes.. Terrible to see and just shows how dangerous our game can be..
— James Muirhead (@Jimmy07Muirhead) November 25, 2014
Thoughts and prayers go out to Phil Hughes and his Family. 🙏
— JP Duminy (@jpduminy21) November 25, 2014
Sad to hear about Phil Hughes,im sure he'll pull up ok.
— herschelle gibbs (@hershybru) November 25, 2014
Thoughts with Phil Hughes. Hope he's ok!
— Jos Buttler (@josbuttler) November 25, 2014
Thoughts with Phil Hughes and his family.
— Steven Finn (@finnysteve) November 25, 2014
Thoughts are with Phil Hughes. Get Well buddy. 🙌🙌
— Wayne Parnell (@WayneParnell) November 25, 2014