The former Spain attacker says the club must keep improving to challenge for top prizes and believes the new signings are an upgrade on the departing Angel Di Maria
The Champions League holders brought in Toni Kroos from Bayern Munich and James Rodriguez from Monaco this summer, but are expected to lose Angel Di Maria to Manchester United after the Argentine requested a transfer following the arrival of the aforementioned duo.
Butragueno is not too concerned about Di Maria's imminent departure, though, and believes it's only logical players will leave Madrid as they continue to strengthen their squad.
"Real Madrid always aim to sign the best players in the world," Butragueno was quoted as saying by AS.
"That means some players will come in and others will go. You have to sign the best in order to fight for all titles.
"Di Maria is a great player. We are waiting for the outcome. If the deal materialises, it's because all parties involved reached an agreement."
The 26-year-old missed Madrid's 2-0 league win over Cordoba on Monday as he travelled to Manchester ahead of his proposed move to Louis van Gaal's side.