Cape Town - Goalkeeper Thibaut Courtois admits he is uncertain of whether or not he will be at Chelsea next season.
The 26-year-old Belgian international helped his side to an 1-0 FA Cup final victory over Manchester United on Saturday.
Eden Hazard's first-half penalty separated the two sides and after the game the former Genk shotstopper revealed he may leave Chelsea in the off-season amid reports of interest from Real Madrid.
Courtois said: "We'll see what is going to happen after the World Cup.
"Like I said in the last weeks or months, I think we'll see after the World Cup whether I am a Chelsea player for next year."
With Chelsea finishing the 2017/18 Premier League season in fifth, Courtois added that he felt some investment was needed at Chelsea if they were to challenge for the league.
"Yes, I think so," he said. "I think especially if you see how City and United are spending and working.
"I think if we want to aim for the top, we should do the same - obviously within the limits of what's possible as well.
"I think that the transfer market has gone pretty crazy. Nowadays, you pay £80m for a defender I think - that's crazy figures.
"We'll see what's going on and I am sure the board will do what needs to be done."