62However, the fact that there is a single and continuous infringement does not necessarily mean that an undertaking participating in one or more aspects can be held liable for the infringement as a whole. The Commission still has to establish that that undertaking was aware of the other undertakings’ anti-competitive activities at European level or that it could reasonably have foreseen them. The mere fact that there is identity of object between an agreement in which an undertaking participated and an overall cartel does not suffice to render that undertaking responsible for the overall cartel. It should be recalled that Article 81(1) EC does not apply unless there exists a concurrence of wills between the parties concerned (see Case T-18/05IMI and Others v Commission [2010] ECR II-1769, paragraph 88 and the case-law cited).