T 's now reported that Klopp , who says he CAN sign Dortmund players should he wish , wants to bring Hummels to Anfield .
The 26 - year - old centre - back has become frustrated at Dortmund .
T 's now reported that Klopp , who says he CAN sign Dortmund players should he wish , wants to bring Hummels to Anfield because the 26 - year - old centre - back has become frustrated at Dortmund .