Methods and systems for enabling streaming of segmented content from a content delivery network to an adaptive streaming client on the basis of a manifest file are described wherein the said manifest file may comprise one or more segment identifiers. The method may comprise: selecting at least one segment identifier from said manifest file, said identifier identifying a segment that has not been requested by said client; and, sending pre-announce information to said content delivery network for announcing in advance that said segment may be requested by said client, said pre-announce information comprising said at least one segment identifier, said pre-announce information being further arranged for triggering said content delivery network to ensure availability of said segment upon receiving said request.