Lionel Messi scored a hat trick to deal a humbling defeat to his former mentor Pep Guardiola on Wednesday, leading Barcelona to an emphatic 4-0 victory over Manchester City in the Champions League. Messi sped through City's defense and around former Barcelona goalkeeper Claudio Bravo before giving the hosts a 17th-minute lead in a Group C match that both teams finished with 10 men. It only got worse for Bravo, who was sent off in the 53rd minute for using his hands to block a shot outside the area after his poor pass gifted the ball to Luis Suarez. More...