Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Virgil van Dijk pleaded with Celtic on Wednesday night to sell him this summer so he can fulfil his European dream with Holland. The Dutch defender told media in his homeland he had been left disappointed that bids for him have been blocked by the Parkhead club during previous transfer windows. But in a move that will dismay Celtic fans, the defender is determined to leave Scottish football behind — citing the top leagues in England, Germany, Spain and France as his preferred destinations — or face kissing goodbye to his hopes of going to the European Championship next summer as part of Guus Hiddink’s Holland squad.Celtic defender Virgil van Dijk wants to leave the club this summerThe 23-year-old says he wants a new challenge after two years at ParkheadVan Dijk says he is risking his chances of making the Holland squad for next summer's European Championship if he stays at CelticThe Dutch defender is eyeing a move to a top league in EuropeMeanwhile, former Bhoys skipper Tom Boyd says Champions League football is more important to the club than the Old Firm derby 
 Question:Especially when you think of the _ next year.

European Championship