Los Blancos broke numerous records on their way to reclaiming La Liga last season, and consequently the former Spain international does not feel they need to strengthen too much
Jose Mourinho's men romped to the Liga title last season, becoming the first side in history to rack up 100 Primera Division points, as they ended Barcelona's three-year reign as champions of Spain.
That has not stopped Madrid being linked with a plethora of players in recent weeks but Karanka cannot foresee Los Blancos embarking on a summer spending spree akin to previous years.
"Given the season we have had and the squad that we have, we should not think of making many changes," he told La Sexta.
Madrid have most recently been linked with Brazilian duo Lucas Moura and Danilo, as well as Chelsea defender Branislav Ivanovic.
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