Complex sentence: After months of campaigning and negotiating, it was officially announced on 14 June 2017 that McGregor would compete in his first professional boxing match against undefeated boxer Floyd Mayweather Jr. on 26 August 2017 in Las Vegas, Nevada, United States.
Split into simpler sentences: After months of campaigning and negotiating, it was officially announced on 14 June 2017 that McGregor would compete in his first professional boxing match against undefeated boxer Floyd Mayweather Junior. The bout is set to take place 26 August 2017 in Las Vegas, Nevada, United States.