West Brom have sacked Nicolas Anelka citing "gross misconduct" after the striker claimed on Twitter he had quit the club.
Mauricio Pochettino expects to be at Southampton next season and is looking forward to working with chairman Ralph Krueger.
Lille midfielder Idrissa Gueye has agreed a three-year contract extension.
The 23-year-old Senegal international is now tied to the Ligue 1 club until the summer of 2018.
Gueye was a member of the Lille squad that won a league and cup double in 2011 and has made 80 league appearances since his debut in 2010.