With his current contract set to end in 2024, the Spain goalkeeper disclosed earlier this week that he has declined two new offers from the Bees.
Since Brentford was promoted to the Premier League in 2021, Raya has established himself as one of the best goalkeepers in the league, and 90min claims that clubs like Chelsea, Manchester United, and Tottenham are interested in a summer transfer of him.
Frank was questioned over Raya’s remarks prior to Brentford’s Saturday trip to Arsenal.
“I think if he turns it [a contract offer] down twice then unfortunately that’s a signal,” he said. “We made two really good offers but that’s fine, it’s a free world. We can’t force anyone.
“That said, David has been amazing for us, coming from Blackburn three-and-a-half years ago.
“In the first season, for me, he was the best ‘keeper in the Championship and then was involved in the play-off final. He made a mistake there but we told him, ‘you will come back stronger’ and the year after, we did it.
“He has taken that form into the Premier League and I think he’s one of the best ‘keepers in this league right now. He’s very focused and every day he’s here, I’m happy.
“He’s one of the captains and he is leading with his performances and his behaviour. He’s a top character.
“I hope he will stay forever but it looks like it could be difficult with the contract situation.
“He must be [worth] at least £40m plus. If he had three years [left on his contract] it would be £70m. How much was Kepa? He is at least as good as him.”