Mario Melchiot claims Bruno Fernandes was ‘lucky’ to avoid a red card against Liverpool on Sunday. Manchester United saw off Liverpool with a dramatic 4-3 win in what was an FA Cup classic at Old Trafford. Amad Diallo proved to be an unlikely hero as the youngster came off the bench to net a last-minute winner in extra time. The winger was instantly sent off after sending the United fan base into a frenzy due to removing his shirt, which ultimately led to a second bookable offence. But Mario Melchiot believes Bruno Fernandes was ‘fortunate’ not to be sent off before Diallo’s dismissal. Melchio…