LONDON — Gentleman Jack Gallagher frustrated Zack Gibson with his mat-wrestling wizardry and even threw caution to the wind with high-flying attacks. The larger Gibson — who drew riotous boos from the fans inside Royal Albert Hall even prior to rejecting Gallagher’s pre-match handshake — deflected the onslaught when he could, even running Gallagher shoulder-first into the steel post. Liverpool’s No. 1 advanced to the next round by booting Gallagher in the shoulder as the 205 Live mainstay was descending with a flying headbutt and locking in the Shankly Gates top wristlock on the same limb for the tapout victory.