Mark Selby has called it “brain-dead” that the VIP Century Club section at the Alexandra Palace hasn’t been soundproofed after he was distracted while attempting to pot a red in his first-round match at the Masters. Selby cruised into the quarter-finals of the Masters after a relatively comfortable victory over Robert Milkins on Wednesday. But the former world No 1 lost his mind in the fourth frame when there was a clattering sound in the audience that appeared to make him miss an easy red into the bottom right pocket. Selby jumped up and furiously swung his cue toward where the noise came fro…