Marca say Pochettino. Hate to say it but I would not be surprised if there's a clause in his new contract to cover exactly this situation.
http://www.marca.com/futbol/real-madrid/2018/05/31/5b0fcc9c268e3ea3618b458e.html
http://www.marca.com/futbol/real-madrid/2018/05/31/5b0fcc9c268e3ea3618b458e.html