 From the quarter-finals onwards, there were no seedings, and teams from the same group or the same association may be drawn with each other.Starting from this season, the matches in the round of 16 were held over four weeks, instead of the previous two weeks.The first legs were played on 16, 17, 23 and 24 February, and the second legs were played on 9, 10, 16 and 17 March 2010.