Paris Saint-Germain head coach Mauricio Pochettino said he will "fight with all my energies" to keep Real Madrid target Kylian Mbappe in the French capital.
Mbappe has long been tipped to join LaLiga champions Madrid, though PSG remain in contract negotiations with the star forward.
The World Cup-winning France international is contracted to PSG until 2022 and Pochettino is confident Mbappe will remain in Paris, where team-mate Neymar has been linked with a return to Barcelona.
"Mbappe to Real Madrid? I'll fight with all my energies to keep Kylian here at PSG," Pochettino told El Larguero.
"PSG are doing everything possible to keep Neymar and Mbappe.
"I am equally optimistic that Mbappe will stay. They both have a huge commitment."
While there are long-term doubts over Mbappe and Neymar, PSG have been linked with blockbuster moves for superstar Barca captain Lionel Messi and Madrid skipper Sergio Ramos.
Messi and Ramos are both out of contract at the end of the season and their futures remain uncertain.
PSG – through to the Champions League semi-finals against Manchester City after eliminating holders Bayern Munich – have reportedly emerged as strong suitors for six-time Ballon d'Or winner Messi and Spain centre-back Ramos.
"Surely soon it will be known what happens with Leo Messi future and contract," Pochettino said.
Pochettino added: "Sergio Ramos? I don't like to talk about players who are not in my team.
"There are a lot of rumours... here at PSG we're working to improve the team."