CONOR McGregor has been spotted taking in the sun from the back of a luxury yacht in Spain.

The Irish boxing champion, 36, has been spending some days in Marbella to promote his upcoming bare knuckle fighting event in October.

A video shared on Instagram shows the father-of-four briefly lifting some weights while docked in Puerto Banus.

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Sporting black and gold Versace swimming briefs, he is then seen waving to people walking by on the dock below.

The UFC legend, who recently visited Mallorca and Ibiza, is the mastermind behind the upcoming bare-knuckle boxing spectacle.

It will be the first time Spain hosts such an event, scheduled to take place at the Marbella Arena on October 12 this year.

The event will mark a significant milestone for the sport, which remains relatively unknown in the country despite its popularity in the UK, the United States, Russia, and Germany.

McGregor, in collaboration with the Bare Knuckle Fighting Championship (BKFC), aims to introduce and expand the reach of bare knuckle boxing in Spain.

So, what exactly is bare-knuckle boxing? Think traditional boxing stripped down to its bare essentials.

The square ring remains, complete with its four ropes, and the fights are contested over five two-minute rounds.

While judges are present to score each round, most bare-knuckle battles are settled with a decisive knockout.

The lack of gloves translates into higher impact punches, significantly increasing the likelihood of a swift knockout.

However, this also comes at the cost of a greater risk for cuts and injuries to both the face and hands.