Cue sports playing nine-ball. Snooker balls are smaller than American-style pool balls with a diameter of 52.5 mm ( in), and come in sets of 22 (15 reds, 6 "", and a cue ball). English billiard balls are the same size as snooker balls and come in sets of three balls (two cue balls and a red, an object ball). Other games, such as bumper pool, have custom ball sets. Billiard balls have been made from many different materials since the start of the game, including clay, bakelite, celluloid, crystallite, ivory, plastic, steel and wood. The dominant material from 1627 until the
Liang Wenbo go... Liang Wenbo", despite the rhyme occurring because of a mispronunciation of his name ("bo" is pronounced "bwor" in Chinese). Liang faced Northern Ireland's Joe Swail in the last 16 of the tournament. In a humorous incident, Liang fluked a red after scattering the balls, but failed to notice and went back to his seat. To laughter, Swail pointed out his mistake and the referee called Liang back to the table. In the 23rd frame, Liang, with a 12–10 lead, prematurely celebrated winning after potting match ball, only to go on to lose the frame due to a snooker. Swail