Barcelona hold the slight edge after Lionel Messi's equaliser gave them a share of the spoils in the first leg of their round of 16 tie with Chelsea at Stamford Bridge. The visitors dominated possession in the first half but, one wayward Paulinho header aside, failed to muster any clear-cut chances and were fortunate to reach the interval level after Willian struck the post on two occasions.The Brazilian fared better in the 62nd minute when he calmly found the bottom corner from the edge of the area. Chelsea looked set to take an advantage to the Camp Nou until Andrés