Salomon Kalou admits his future hangs in the balance after attracting interest from the Premier League and Bundesliga.
Christoph Kramer sprang from the bench to earn Borussia Monchengladbach a 1-1 draw with Stuttgart.
Villarreal, Real Sociedad, PSV Eindhoven and Dinamo Zagreb all enjoyed wins in the Europa League qualifying play-offs.
Borussia Monchengladbach coach Lucien Favre has revealed his struggle to attract players to the Bundesliga club.
Stuttgart followed Mainz out of the DFB-Pokal in the first round, succumbing 2-0 to Bochum, while Marco Reus returned in a victory for Borussia Dortmund.
Tottenham will take on Cypriot side AEL Limassol in the Europa League play-off round, while Hull face Lokeren.
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