A man has been left with a swollen and disfigured face after partaking in the RXF Slap Fighting championships in Romania.

A video clip from the tournament has gone viral after competitor Sorin Comsa received a brutal strike to the head, which had him looking unrecognizable from the start of the day.

Many have been quick to comment on the clip including UFC star Conor McGregor, who praised the 'gorgeous technique' shown in the bizarre event.

In the clip, which happened to be the final of the tournament, Comsa is competing against Alexandru Gorczyca. The latter bides his time before landing a flush, open-palm strike on his opponent.

The sport has grown in popularity - amid UFC president Dana White's plans to launch a Power Slap League - and, because of this, the clip caught the attention of some big names.

Conor McGregor - who fights in White's organization - analyzed Gorczyca's brutal strike and tweeted: 'Gorgeous technique congrats the new heavyweight champion'.

Some were quick to note the timely comment from the 'Notorious', given the fact that White's new promotion will debut on Wednesday night.

Despite receiving the heavy blow in the video clip, Comsa went on to beat his opponent to be crowned the champion of the entire tournament.

For his efforts, the Romanian picked up the RXF heavyweight title and £4430 (€5000) in prize money.

Slap fighting is a sport that involves two competitors standing in front of each other and taking turns to land an open-palm strike on their counterparts.

UFC president came under fire for promoting his new Power Slap League after a video emerged of him striking his wife during a New Year's Eve party.