Among the keen observers at Monday night's FA Cup quarter-final between Chelsea and Manchester United were representatives of Real Madrid, as the Spanish side continued to monitor their goalkeeping targets.

Fresh high profile mistakes by Keylor Navas have reignited the debate around the Merengues custodian with David De Gea and Thibaut Courtois two options to replace the Costa Rican.

During the match, the United shot-stopper was certainly the more tested of the two, pulling off a world class dive to prevent Gary Cahill from opening the scoring in the first-half, although his positioning for N'Golo Kante's winner has been questioned by some.

As for Courtois, the Belgian made himself big to deny a stunning equaliser for Marcus Rashford with the clock ticking as part of yet another clean sheet at Stamford Bridge.The Real scouts made note of every little detail of both keeper's performance, with further reports to be made as the LaLiga leaders consider where they will begin their pursuit in the summer.