Sanches, 19, has started only four Bundesliga games since joining from Benfica for an initial €35 million fee.
Thomas Muller has devised an ingenious ploy for dodging past the press hordes at airports by pretending to be on the phone.
UEFA report says five of the clubs are in the Premier League -- Manchester United, Manchester City, Arsenal, Chelsea and Liverpool.
Toprak, who has been strongly linked with a move to Borussia Dortmund, has been at Leverkusen for six years.
Eintracht Frankfurt's Jesus Vallejo has not had contact with Real Madrid coach Zinedine Zidane and says he doesn't know if he will return to the club.
Werder Bremen have said they have no plans to sign Arsenal captain Per Mertesacker on loan.