Who will be Real Madrid's starting goalkeeper next season?

Weeks ago, Real Madrid seemed ready to complete the signing of Manchester United goalkeeper David De Gea, but things might be different now. Manchester United decided not to let De Gea go even though the Spanish keeper could walk away as a free agent in 12 months, and Real Madrid made their move and signed Espanyol's Kiko Casilla. Who will replace Iker Casillas this season?

The answer seems fairly simple. If De Gea finally stays with Manchester United, Keylor Navas and Casilla will be competing for the starting spot. The Costa Rican could and should be ahead of him, but Rafa Benítez might think otherwise as he usually likes taller goalkeepers. Then, De Gea could sign for Real Madrid next summer and the club would probably sell Navas and keep Casilla as the reserve goalkeeper.

This is exactly what will happen if De Gea ends up signing for Real Madrid this very same summer. Keylor Navas knows that he is not going to get minutes with De Gea on the roster, so he will probably try to find a club willing to make him a regular. He's too good to be on the bench permanently, but is he ready to start for such a big club like Real Madrid?

Florentino Pérez and his board need to make some very important calls. Keylor Navas and Casilla are good goalkeepers, there's no question about that. However, nobody knows whether they will be ready to face the pressure of replacing club legend Iker Casillas or not, meaning that it might be somewhat risky not to sign De Gea now. Manchester United are asking for a lot of money considering that De Gea's contract expires in 12 months, but they have every right to do so.

Should Real Madrid keep waiting to see if United lower their demands? Is saving €30 million worth the risk of having two unproven goalkeepers -- in big clubs -- on the roster?