Manchester City is reportedly targeting Negredo and Fiorentina striker Stevan Jovetic to boost its attacking options, having been unable to reach a deal with Napoli for Edinson Cavani. Funds are much-needed at Sevilla, and Emery has given the strongest indication yet the 27-year-old could leave the Liga club, which is reportedly trying to push his price beyond 23 million euros.
"The most likely situation is that he will leave," Emery said. "The cards are on the table. Negredo is a very important player to Sevilla and he could continue to be one, either by staying here or by earning the club a big transfer fee.
"We know he could leave, but it would be the best for everyone.
"The club would be able to meet its financial obligations, and although we would lose a key player, we need to be reasonable, like we were in the case of Navas.
"Our aim is to produce new players that can reach the same heights.
"It's possible the club can't reach an agreement for him, but we are prepared, we have spent some time working on alternatives.
Negredo scored 25 league goals last season, with only Lionel Messi, Cristiano Ronaldo and Radamel Falcao scoring more.
"Of course we're not going to find a player with the same characteristics as him or one who is going to have the same record," Emery said. "But we will find players who will be important to the future of this club, and I trust the work the club is doing in that area."