NXT TakeOver: Brooklyn 4

NXT TakeOver: Brooklyn 4 was the 21st NXT TakeOver and the fourth and final TakeOver: Brooklyn professional wrestling livestreaming event produced by WWE. It was held exclusively for wrestlers from the promotion's NXT brand division. The event aired exclusively on the WWE Network and took place on August 18, 2018, at the Barclays Center in Brooklyn, New York as part of that year's SummerSlam weekend.

Seven matches were contested at the event, including two taped for the August 22 episode of NXT. In the main event, Tommaso Ciampa defeated Johnny Gargano in a Last Man Standing match to retain the NXT Championship. In other prominent matches, Kairi Sane defeated Shayna Baszler to win the NXT Women's Championship, and Ricochet defeated Adam Cole to win the NXT North American Championship.

TakeOver was a series of professional wrestling events that began in May 2014, as WWE's then-developmental league NXT held its second WWE Network-exclusive event, billed as TakeOver. In subsequent months, the "TakeOver" moniker became the brand used by WWE for all of its major NXT events. Announced on August 14, 2017, Brooklyn 4 was scheduled as the 21st NXT TakeOver event and was held on August 18, 2018, as a support show for that year's SummerSlam pay-per-view. It was the fourth in the TakeOver: Brooklyn chronology, a subseries of TakeOvers that were held at the Barclays Center in Brooklyn, New York as a support show for WWE's annual SummerSlam pay-per-view.

The card included matches that resulted from scripted storylines. Results were predetermined by WWE's writers on the NXT brand, while storylines were produced on WWE's weekly television program, NXT.

On the July 18 episode of NXT, Kairi Sane defeated Candice LeRae and Nikki Cross in a triple threat match to become the number one contender for the NXT Women's Championship and would face Shayna Baszler for the title at TakeOver: Brooklyn 4.

On the July 25 episode of NXT, Ricochet confronted Adam Cole after his match with Sean Maluta. Ricochet then challenged Cole to a match at TakeOver: Brooklyn 4 for the North American Championship, but Cole refused. The following week, a match between Cole and Ricochet for the title was scheduled for TakeOver: Brooklyn 4.

On June 26 at the NXT U.K. Championship event, Moustache Mountain (Tyler Bate and Trent Seven) defeated The Undisputed Era's Kyle O'Reilly and Roderick Strong to capture the NXT Tag Team Championship. On the June 27 episode of NXT, The Undisputed Era defeated Moustache Mountain and Ricochet. Two weeks later, a rematch between the two teams for the titles was scheduled, with The Undisputed Era recapturing the titles. On the August 1 episode of NXT, a tag team match between the two teams for the titles was scheduled for TakeOver: Brooklyn 4.

On June 26 at the NXT U.K. Championship, EC3 and Velveteen Dream teamed up and were defeated by Aleister Black and Ricochet after Dream left the ring during the match. On the August 1 episode of NXT, a match between the two was scheduled for TakeOver: Brooklyn 4.