Castagne is weighing up his options ahead of the summer market and is being linked with PSG.
But Le 10 Sport says Tottenham are also keen, where manager Jose Mourinho is a big fan.
Mourinho is in the market for a new fullback and has approved a move for Castagne.
The Belgium international recently told RTBF: "I like the Premier League and the direct play they play in England. But whether it comes now or in a few years, it doesn't matter."