We have seen new faces arrive on the scene, jaw-dropping submissions, insane knockouts, memorable upsets, and so much more. As the second half of the year nears, it is a great time to reflect on what has already transpired.

One of the most notable happenings for ONE in 2021 has been the ONE on TNT event series in April. The series got kickstarted by Adriano Moraes' stunning upset knockout over Demetrious Johnson to retain the ONE Flyweight World Championship.

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The very next event saw Christian Lee retain his ONE Lightweight World Title with a lightning-quick knockout over Timofey Nastyukhin.

While those two champions got to keep their gold, there was also a new king crown in the first half of the year. Canadian-Indian star Arjan Bhullar finally got his shot against Brandon Vera and made the most of it with a second-round finish to become the second-ever ONE Heavyweight World Champion.

And those were just a few of the World Championship matches that have led the way. There have been more titles on the line and more stunning back-and-forth battles between contenders trying to work their way up to the top.

And we should not forget the dazzling display from ONE Super Series athletes either. Rodtang Jitmuangnon has helped lead that charge and introduced himself to a primetime American audience with a three-round thriller against Australian Daniel Williams.

If you missed any of the action, don't fret. Courtesy of ONE, enjoy this compilation of highlights detailing the amazing action from athletes who stepped onto the global stage in the first six months of 2021.