Borussia Dortmund respond to Bayern Munich with opening day win thanks to Pierre-Emerick Aubameyang's double.
Schalke have signed midfielder Benjamin Stambouli from Paris Saint-Germain on a four-year contract for an undisclosed fee.
Man Utd will face Fenerbahce, Feyenoord and Zorya Luhansk in the Europa League, while Southampton are in a group with Inter Milan.
Nabil Bentaleb has joined German side Schalke on a season-long loan from Tottenham, the Premier League club has confirmed.
Schalke had no choice but to sell Leroy Sane to Manchester City, says sporting director Christian Heidel.
Schalke have agreed to sign Sevilla right-back Coke on a three-year contract, the Bundesliga side confirmed on Wednesday.