Former Bayern Munich goalkeeper Oliver Kahn believes it is too hard to sign big money players in this day and age.
However Die Roten have baulked at the transfer fee - Arsenal want £50m - and the player's wage demands, which some have reported to be in excess of £350,000-per-week.
"Of course [Sanchez is a target], but today in professional football, it's not very easy to get a big transfer - the so-called 'grenade'," Kahn told Omnisport. "That's the same for Bayern.
"It's not easy to get a new [Franck] Ribery or a new [Arjen] Robben, because other clubs don't necessarily have to sell their players because they have an enormous amount of money.
"They can make players stay at the club and that's what makes it more difficult for Bayern to buy top stars."