Liverpool warned that luring Roberto Martinez from Wigan will cost 'a minimum of £2-3 million' Whelan said if Martinez decides to go, "I will accept it and get on with life. If it's "no" I'll be delighted. I would love him to stay, I hope he will stay, but I told him I need an answer in the next seven days. Liverpool are determined to interview an extensive list of candidates to succeed Dalglish, although former Chelsea manager Andres Villas-Boas is understood to be out of the running to take the position. FSG also keen to restructure senior management positions at Anfield and Whelan has warned Martinez that he risks losing full control of football matters if he leaves Wigan for Liverpool. Whelan said: "My information is that the new Liverpool manager will not be given full responsibility of the football department. But Roberto likes total control, from the youngsters at 16 to the first team, so if he doesn't get that, I don't think he will take the job. Off the field, Liverpool have taken steps to fill the vacuum of senior figures at Anfield by appointing Fenway Sports Management's managing director, Billy Hogan, as chief commercial officer. Jen Chang, formerly of the American magazine Sports Illustrated, has replaced Ian Cotton as the club's corporate relations and communications director. Attempts to fill the sporting director position are continuing, and Van Gaal is understood to be a leading candidate for that position. The former Ajax, Barcelona and Bayern Munich coach apparently prefers the managerial role, however, and Liverpool's Dutch forward, Dirk Kuyt, insists that Van Gaal would bring knowledge and experience to Anfield. Kuyt said: "It is not usual for players to speak about candidates, but he is a Dutchman, has a great track record and has the experience that the club could put to good use. At the moment, Liverpool have no coach or technical director, but each club benefits from structure. You look at the Dutch national team and see that consistency and clarity are important. Meanwhile, Italian midfielder Alberto Aquilani could be forced to return to Anfield this summer after failing to make enough appearances on loan at AC Milan to trigger a £6 million buy-out clause. Milan vice-president Adriano Galliani claims that a deal could still be struck for the former Roma player, however. "We will not use our option to buy Aquilani before May 31," Galliani said. We will reopen talks with Liverpool in June.